136 lines
5.7 KiB
JSON
136 lines
5.7 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-2026-34831",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-03-30T20:52:53.284Z",
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"datePublished": "2026-04-02T16:43:08.762Z",
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"dateUpdated": "2026-04-03T17:48:11.330Z"
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},
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"containers": {
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"cna": {
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"title": "Rack: Content-Length mismatch in Rack::Files error responses",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-130",
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"lang": "en",
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"description": "CWE-130: Improper Handling of Length Parameter Inconsistency",
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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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"descriptions": [
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{
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"cweId": "CWE-135",
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"lang": "en",
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"description": "CWE-135: Incorrect Calculation of Multi-Byte String Length",
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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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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "HIGH",
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"attackVector": "NETWORK",
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"availabilityImpact": "NONE",
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"baseScore": 4.8,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "LOW",
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"integrityImpact": "LOW",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
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"version": "3.1"
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}
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}
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],
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"references": [
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{
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"name": "https://github.com/rack/rack/security/advisories/GHSA-q2ww-5357-x388",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/rack/rack/security/advisories/GHSA-q2ww-5357-x388"
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}
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],
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"affected": [
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{
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"vendor": "rack",
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"product": "rack",
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"versions": [
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{
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"version": "< 2.2.23",
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"status": "affected"
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},
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{
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"version": ">= 3.0.0.beta1, < 3.1.21",
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"status": "affected"
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},
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{
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"version": ">= 3.2.0, < 3.2.6",
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"status": "affected"
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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": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-04-02T16:43:08.762Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Files#fail sets the Content-Length response header using String#size instead of String#bytesize. When the response body contains multibyte UTF-8 characters, the declared Content-Length is smaller than the number of bytes actually sent on the wire. Because Rack::Files reflects the requested path in 404 responses, an attacker can trigger this mismatch by requesting a non-existent path containing percent-encoded UTF-8 characters. This results in incorrect HTTP response framing and may cause response desynchronization in deployments that rely on the incorrect Content-Length value. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6."
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}
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],
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"source": {
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"advisory": "GHSA-q2ww-5357-x388",
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"discovery": "UNKNOWN"
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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": "2026-04-03T17:43:52.462237Z",
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"id": "CVE-2026-34831",
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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": "2026-04-03T17:48:11.330Z"
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}
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}
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]
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}
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} |