{"id":"CVE-2026-27888","state":"PUBLISHED","title":"pypdf: Manipulated FlateDecode XFA streams can exhaust RAM","description":"pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the `xfa` property of a reader or writer and the corresponding stream being compressed using `/FlateDecode`. This has been fixed in pypdf 6.7.3. As a workaround, apply the patch manually.","publishedAt":"2026-02-26T00:42:00.542Z","updatedAt":"2026-06-23T15:49:46.210Z","severity":{"score":6.6,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U","source":"GitHub_M"},"assigner":"GitHub_M","products":["py-pdf pypdf"],"affected":[{"vendor":"py-pdf","product":"pypdf","versions":[{"version":"< 6.7.3","status":"affected"}]}],"references":["https://github.com/py-pdf/pypdf/security/advisories/GHSA-x7hp-r3qg-r3cj","https://github.com/py-pdf/pypdf/pull/3658","https://github.com/py-pdf/pypdf/commit/7a4c8246ed48d9d328fb596942271da47b6d109c","https://github.com/py-pdf/pypdf/releases/tag/6.7.3"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/27xxx/CVE-2026-27888.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-27888","state":"PUBLISHED","datePublished":"2026-02-26T00:42:00.542Z","dateUpdated":"2026-06-23T15:49:46.210Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-02-24T15:19:29.716Z"},"containers":{"cna":{"title":"pypdf: Manipulated FlateDecode XFA streams can exhaust RAM","descriptions":[{"lang":"en","value":"pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the `xfa` property of a reader or writer and the corresponding stream being compressed using `/FlateDecode`. This has been fixed in pypdf 6.7.3. As a workaround, apply the patch manually."}],"affected":[{"vendor":"py-pdf","product":"pypdf","versions":[{"version":"< 6.7.3","status":"affected"}]}],"references":[{"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-x7hp-r3qg-r3cj","name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-x7hp-r3qg-r3cj","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/py-pdf/pypdf/pull/3658","name":"https://github.com/py-pdf/pypdf/pull/3658","tags":["x_refsource_MISC"]},{"url":"https://github.com/py-pdf/pypdf/commit/7a4c8246ed48d9d328fb596942271da47b6d109c","name":"https://github.com/py-pdf/pypdf/commit/7a4c8246ed48d9d328fb596942271da47b6d109c","tags":["x_refsource_MISC"]},{"url":"https://github.com/py-pdf/pypdf/releases/tag/6.7.3","name":"https://github.com/py-pdf/pypdf/releases/tag/6.7.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.6,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-02-26T00:42:00.542Z"},"source":{"advisory":"GHSA-x7hp-r3qg-r3cj","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-26T16:15:44.619815Z","id":"CVE-2026-27888","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-23T15:49:46.210Z"}}]}}}