286 lines
13 KiB
JSON
286 lines
13 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-43970",
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"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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"state": "PUBLISHED",
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"assignerShortName": "EEF",
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"dateReserved": "2026-05-04T18:23:25.574Z",
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"datePublished": "2026-05-13T18:43:11.640Z",
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"dateUpdated": "2026-05-15T04:33:30.898Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"collectionURL": "https://repo.hex.pm",
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"cpes": [
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"cpe:2.3:a:ninenines:cowlib:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"cow_spdy"
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],
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"packageName": "cowlib",
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"packageURL": "pkg:hex/cowlib",
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"product": "cowlib",
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"programFiles": [
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"src/cow_spdy.erl"
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],
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"programRoutines": [
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{
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"name": "cow_spdy:parse/2"
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},
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{
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"name": "cow_spdy:inflate/2"
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},
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{
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"name": "cow_spdy:parse_headers/2"
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},
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{
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"name": "cow_spdy:parse_headers/4"
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}
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],
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"repo": "https://github.com/ninenines/cowlib",
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"vendor": "ninenines",
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"versions": [
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{
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"lessThan": "2.16.1",
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"status": "affected",
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"version": "0.1.0",
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"versionType": "semver"
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}
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]
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},
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{
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"collectionURL": "https://github.com",
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"cpes": [
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"cpe:2.3:a:ninenines:cowlib:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"cow_spdy"
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],
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"packageName": "ninenines/cowlib",
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"packageURL": "pkg:github/ninenines/cowlib",
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"product": "cowlib",
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"programFiles": [
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"src/cow_spdy.erl"
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],
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"programRoutines": [
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{
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"name": "cow_spdy:parse/2"
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},
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{
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"name": "cow_spdy:inflate/2"
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},
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{
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"name": "cow_spdy:parse_headers/2"
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},
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{
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"name": "cow_spdy:parse_headers/4"
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}
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],
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"repo": "https://github.com/ninenines/cowlib",
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"vendor": "ninenines",
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"versions": [
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{
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"lessThan": "16aad3fb9f81f5cda4d1706ff0c54237c619c282",
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"status": "affected",
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"version": "fad5c0049df278cc498b6cdb519b09e845a070a8",
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"versionType": "git"
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}
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]
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}
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],
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"configurations": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p>The application must use <tt>cow_spdy:parse/2</tt> to parse SPDY frames from an untrusted peer. cowboy itself does not use <tt>cow_spdy</tt>; only direct callers of the <tt>cow_spdy</tt> API are affected.</p>"
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}
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],
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"value": "The application must use cow_spdy:parse/2 to parse SPDY frames from an untrusted peer. cowboy itself does not use cow_spdy; only direct callers of the cow_spdy API are affected."
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"cpeMatch": [
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{
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"criteria": "cpe:2.3:a:ninenines:cowlib:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "2.16.1",
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"versionStartIncluding": "0.1.0",
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"vulnerable": true
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}
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],
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"negate": false,
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"operator": "OR"
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}
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]
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}
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],
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"credits": [
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{
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"lang": "en",
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"type": "finder",
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"value": "Peter Ullrich"
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},
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{
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"lang": "en",
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"type": "remediation developer",
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"value": "Loïc Hoguin"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p>Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in ninenines cowlib allows unauthenticated remote denial of service via memory exhaustion.</p><p><tt>cow_spdy:inflate/2</tt> in cowlib passes peer-supplied compressed bytes directly to <tt>zlib:inflate/2</tt> with no output size bound. The SPDY header compression dictionary (<tt>?ZDICT</tt>) is public, and zlib compresses long runs of repeated bytes at roughly 1024:1, so a few kilobytes of SPDY frame payload can decompress to gigabytes on the BEAM heap, OOM-killing the node. A single unauthenticated SPDY frame is sufficient to trigger the condition. The parsers for <tt>syn_stream</tt>, <tt>syn_reply</tt>, and <tt>headers</tt> frame types are all affected via <tt>cow_spdy:parse_headers/2</tt>.</p><p>This issue affects cowlib from 0.1.0 before 2.16.1.</p>"
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}
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],
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"value": "Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in ninenines cowlib allows unauthenticated remote denial of service via memory exhaustion.\n\ncow_spdy:inflate/2 in cowlib passes peer-supplied compressed bytes directly to zlib:inflate/2 with no output size bound. The SPDY header compression dictionary (?ZDICT) is public, and zlib compresses long runs of repeated bytes at roughly 1024:1, so a few kilobytes of SPDY frame payload can decompress to gigabytes on the BEAM heap, OOM-killing the node. A single unauthenticated SPDY frame is sufficient to trigger the condition. The parsers for syn_stream, syn_reply, and headers frame types are all affected via cow_spdy:parse_headers/2.\n\nThis issue affects cowlib from 0.1.0 before 2.16.1."
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}
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],
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"impacts": [
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{
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"capecId": "CAPEC-130",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-130 Excessive Allocation"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV4_0": {
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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"attackVector": "NETWORK",
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"baseScore": 8.2,
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"baseSeverity": "HIGH",
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"privilegesRequired": "NONE",
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"subAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"userInteraction": "NONE",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
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"version": "4.0",
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"vulnAvailabilityImpact": "HIGH",
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"vulnConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "NONE"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-409",
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"description": "CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
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"shortName": "EEF",
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"dateUpdated": "2026-05-15T04:33:30.898Z"
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},
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"references": [
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{
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"tags": [
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"related",
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"third-party-advisory"
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],
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"url": "https://cna.erlef.org/cves/CVE-2026-43970.html"
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},
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{
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"tags": [
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"related"
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],
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"url": "https://osv.dev/vulnerability/EEF-CVE-2026-43970"
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},
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{
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"tags": [
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"patch"
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],
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"url": "https://github.com/ninenines/cowlib/commit/16aad3fb9f81f5cda4d1706ff0c54237c619c282"
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}
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],
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"solutions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<p>Upgrade to cowlib 2.16.1 or later, in which the <tt>cow_spdy</tt> module has been removed entirely. No patched version of <tt>cow_spdy</tt> will be provided. Migrate away from SPDY, which has been deprecated since 2015 in favour of HTTP/2.</p>"
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}
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],
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"value": "Upgrade to cowlib 2.16.1 or later, in which the cow_spdy module has been removed entirely. No patched version of cow_spdy will be provided. Migrate away from SPDY, which has been deprecated since 2015 in favour of HTTP/2."
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}
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],
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"source": {
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"discovery": "EXTERNAL"
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},
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"title": "Decompression Bomb in cow_spdy:inflate/2 Allows Memory Exhaustion via Crafted SPDY Frame",
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"x_generator": {
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"engine": "cvelib 1.8.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-05-14T12:38:59.086048Z",
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"id": "CVE-2026-43970",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-05-14T12:39:10.669Z"
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}
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}
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]
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}
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} |