{"id":"CVE-2026-113791","state":"PUBLISHED","title":"pypdf: Possible large memory usage when parsing content streams","description":"pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing a content stream with many small operations, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0.","publishedAt":"2026-10-21T15:37:50.527Z","updatedAt":"2026-10-30T15:57:39.880Z","severity":{"score":6,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["py-pdf pypdf"],"affected":[{"vendor":"py-pdf","product":"pypdf","versions":[{"version":"< 6.21.0","status":"affected"}]}],"references":["https://github.com/py-pdf/pypdf/security/advisories/GHSA-cgf9-327m-v77c","https://github.com/py-pdf/pypdf/pull/4218","https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12","https://github.com/py-pdf/pypdf/releases/tag/6.21.0"],"weaknesses":["CWE-400","CWE-770"],"ingestedAt":"2026-10-30T16:02:06.859Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/113xxx/CVE-2026-113791.json","commit":"f6a539faf8b8016bd4a4e7f5576fe5f6ea87d248","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-113791","state":"PUBLISHED","datePublished":"2026-10-21T15:37:50.527Z","dateUpdated":"2026-10-30T15:57:39.880Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-20T17:39:41.373Z"},"containers":{"cna":{"title":"pypdf: Possible large memory usage when parsing content streams","descriptions":[{"lang":"en","value":"pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing a content stream with many small operations, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0."}],"affected":[{"vendor":"py-pdf","product":"pypdf","versions":[{"version":"< 6.21.0","status":"affected"}]}],"references":[{"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-cgf9-327m-v77c","name":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-cgf9-327m-v77c","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/py-pdf/pypdf/pull/4218","name":"https://github.com/py-pdf/pypdf/pull/4218","tags":["x_refsource_MISC"]},{"url":"https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12","name":"https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12","tags":["x_refsource_MISC"]},{"url":"https://github.com/py-pdf/pypdf/releases/tag/6.21.0","name":"https://github.com/py-pdf/pypdf/releases/tag/6.21.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-21T15:37:50.527Z"},"source":{"advisory":"GHSA-cgf9-327m-v77c","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-30T15:57:28.851965Z","id":"CVE-2026-113791","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-30T15:57:39.880Z"}}]}}}