{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-27026","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-02-17T03:08:23.491Z","datePublished":"2026-02-20T21:12:33.537Z","dateUpdated":"2026-02-24T18:47:02.304Z"},"containers":{"cna":{"title":"pypdf possibly has long runtimes for malformed FlateDecode streams","problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-9mvc-8737-8j8h","tags":["x_refsource_CONFIRM"],"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-9mvc-8737-8j8h"},{"name":"https://github.com/py-pdf/pypdf/pull/3644","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/pull/3644"},{"name":"https://github.com/py-pdf/pypdf/commit/7905842d833f899f1d3228af7e7467ad80277016","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/commit/7905842d833f899f1d3228af7e7467ad80277016"},{"name":"https://github.com/py-pdf/pypdf/releases/tag/6.7.1","tags":["x_refsource_MISC"],"url":"https://github.com/py-pdf/pypdf/releases/tag/6.7.1"}],"affected":[{"vendor":"py-pdf","product":"pypdf","versions":[{"version":"< 6.7.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-02-20T21:12:33.537Z"},"descriptions":[{"lang":"en","value":"pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires a malformed /FlateDecode stream, where the byte-by-byte decompression is used. This vulnerability is fixed in 6.7.1."}],"source":{"advisory":"GHSA-9mvc-8737-8j8h","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-24T18:46:44.502341Z","id":"CVE-2026-27026","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":"2026-02-24T18:47:02.304Z"}}]}}