262 lines
11 KiB
JSON
262 lines
11 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-2026-39805",
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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": "2026-04-07T12:28:54.916Z",
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"datePublished": "2026-05-01T20:34:29.400Z",
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"dateUpdated": "2026-07-24T14:16:00.658Z"
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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:mtrudel:bandit:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.Bandit.Headers'"
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],
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"packageName": "bandit",
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"packageURL": "pkg:hex/bandit",
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"product": "bandit",
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"programFiles": [
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"lib/bandit/headers.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.Bandit.Headers':get_content_length/1"
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}
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],
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"repo": "https://github.com/mtrudel/bandit",
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"vendor": "mtrudel",
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"versions": [
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{
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"lessThan": "1.11.0",
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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:mtrudel:bandit:*:*:*:*:*:*:*:*"
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],
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"defaultStatus": "unaffected",
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"modules": [
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"'Elixir.Bandit.Headers'"
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],
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"packageName": "mtrudel/bandit",
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"packageURL": "pkg:github/mtrudel/bandit",
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"product": "bandit",
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"programFiles": [
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"lib/bandit/headers.ex"
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],
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"programRoutines": [
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{
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"name": "'Elixir.Bandit.Headers':get_content_length/1"
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}
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],
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"repo": "https://github.com/mtrudel/bandit",
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"vendor": "mtrudel",
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"versions": [
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{
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"lessThan": "f2ca636eb6df385219957e8934e9fc6efa1630d1",
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"status": "affected",
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"version": "7bc8d97cd22697c299baa8012b7f419a7606a80c",
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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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"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:mtrudel:bandit:*:*:*:*:*:*:*:*",
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"versionEndExcluding": "1.11.0",
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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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"operator": "AND"
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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": "Mat Trudel"
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},
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{
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"lang": "en",
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"type": "analyst",
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"value": "Jonatan Männchen / EEF"
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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": "Inconsistent Interpretation of HTTP Requests vulnerability in mtrudel bandit allows HTTP request smuggling via duplicate <tt>Content-Length</tt> headers.<p><tt>'Elixir.Bandit.Headers':get_content_length/1</tt> in <tt>lib/bandit/headers.ex</tt> uses <tt>List.keyfind/3</tt>, which returns only the first matching header. When a request contains two <tt>Content-Length</tt> headers with different values, Bandit silently accepts it, uses the first value to read the body, and dispatches the remaining bytes as a second pipelined request on the same keep-alive connection. RFC 9112 §6.3 requires recipients to treat this as an unrecoverable framing error.</p><p>When Bandit sits behind a proxy that picks the last <tt>Content-Length</tt> value and forwards the request rather than rejecting it, an unauthenticated attacker can smuggle requests past edge WAF rules, path-based ACLs, rate limiting, and audit logging.</p><p>This issue affects bandit: before 1.11.0.</p>"
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}
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],
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"value": "Inconsistent Interpretation of HTTP Requests vulnerability in mtrudel bandit allows HTTP request smuggling via duplicate Content-Length headers.\n\n'Elixir.Bandit.Headers':get_content_length/1 in lib/bandit/headers.ex uses List.keyfind/3, which returns only the first matching header. When a request contains two Content-Length headers with different values, Bandit silently accepts it, uses the first value to read the body, and dispatches the remaining bytes as a second pipelined request on the same keep-alive connection. RFC 9112 §6.3 requires recipients to treat this as an unrecoverable framing error.\n\nWhen Bandit sits behind a proxy that picks the last Content-Length value and forwards the request rather than rejecting it, an unauthenticated attacker can smuggle requests past edge WAF rules, path-based ACLs, rate limiting, and audit logging.\n\nThis issue affects bandit: before 1.11.0."
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}
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],
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"impacts": [
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{
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"capecId": "CAPEC-33",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-33 HTTP Request Smuggling"
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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": 6.3,
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"baseSeverity": "MEDIUM",
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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:L/VI:L/VA:N/SC:N/SI:N/SA:N",
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"version": "4.0",
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"vulnAvailabilityImpact": "NONE",
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"vulnConfidentialityImpact": "LOW",
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"vulnIntegrityImpact": "LOW"
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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-444",
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"description": "CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')",
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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": "2026-07-24T14:16:00.658Z"
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},
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"references": [
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{
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"tags": [
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"vendor-advisory",
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"related"
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],
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"url": "https://github.com/mtrudel/bandit/security/advisories/GHSA-c67r-gc9j-2qf7"
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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://cna.erlef.org/cves/CVE-2026-39805.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-2026-39805"
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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/mtrudel/bandit/commit/f2ca636eb6df385219957e8934e9fc6efa1630d1"
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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": "CL.CL HTTP request smuggling via duplicate Content-Length in bandit",
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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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"references": [
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{
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"url": "https://github.com/mtrudel/bandit/security/advisories/GHSA-c67r-gc9j-2qf7",
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"tags": [
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"exploit"
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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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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-05-02T01:20:49.825555Z",
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"id": "CVE-2026-39805",
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"options": [
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{
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"Exploitation": "poc"
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},
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{
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"Automatable": "yes"
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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": "2026-05-02T01:21:12.460Z"
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}
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}
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]
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}
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} |