{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97689","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-09-24T21:43:37.208Z","datePublished":"2026-09-29T15:36:05.963Z","dateUpdated":"2026-09-29T16:23:23.167Z"},"containers":{"cna":{"title":"urllib3: HTTPResponse.stream()/read_chunked() buffers an unbounded chunk-size line into memory","problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"HIGH","baseScore":8.9,"baseSeverity":"HIGH","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:H","version":"4.0"}}],"references":[{"name":"https://github.com/urllib3/urllib3/security/advisories/GHSA-vxq7-64xx-v4gw","tags":["x_refsource_CONFIRM"],"url":"https://github.com/urllib3/urllib3/security/advisories/GHSA-vxq7-64xx-v4gw"},{"name":"https://github.com/urllib3/urllib3/commit/cd770b059b543be29298ea5c52afb0b1b090f5ed","tags":["x_refsource_MISC"],"url":"https://github.com/urllib3/urllib3/commit/cd770b059b543be29298ea5c52afb0b1b090f5ed"},{"name":"https://github.com/urllib3/urllib3/releases/tag/2.8.0","tags":["x_refsource_MISC"],"url":"https://github.com/urllib3/urllib3/releases/tag/2.8.0"}],"affected":[{"vendor":"urllib3","product":"urllib3","versions":[{"version":">= 1.10.3, < 2.8.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-29T15:36:39.904Z"},"descriptions":[{"lang":"en","value":"urllib3 is an HTTP client library for Python. From 1.10.3 until 2.8.0, the HTTPResponse.read_chunked and HTTPResponse.stream methods can allocate unbounded memory because the streaming chunk parser buffers the chunk-size field until newline or EOF without a length bound. The trigger is that a malicious server returns Transfer-Encoding: chunked followed by a very long run of bytes without a newline. The attack mechanism is that a malicious HTTP server sends a very long unterminated chunk-size line. The impact is that unbounded memory allocation can exhaust the client process. This issue is fixed in version 2.8.0."}],"source":{"advisory":"GHSA-vxq7-64xx-v4gw","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-29T16:21:49.840583Z","id":"CVE-2026-97689","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-29T16:23:23.167Z"}}]}}