{"id":"CVE-2026-113795","aliases":["GHSA-7mh2-4gg2-979f"],"title":"pypdf: Possible large memory usage for streams with multiple filters","summary":"pypdf: Possible large memory usage for streams with multiple filters","severity":"medium","cvss":6,"cwe":["CWE-400","CWE-770"],"vendor":"pypdf","product":"pypdf","ecosystem":"pip","affected":["pypdf < 6.20.0"],"patched":["pypdf 6.20.0"],"published":"2026-10-21","updated":"2026-10-21","sourceUpdated":"2026-10-21T16:48:32Z","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-7mh2-4gg2-979f","references":[{"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-7mh2-4gg2-979f"},{"url":"https://github.com/py-pdf/pypdf/pull/4173"},{"url":"https://github.com/py-pdf/pypdf/commit/80a84d4be6022d910874ccb0d2365400f3f0e185"},{"url":"https://github.com/py-pdf/pypdf/releases/tag/6.20.0"},{"url":"https://github.com/advisories/GHSA-7mh2-4gg2-979f"}],"tags":["ghsa","pip","cve.org"],"cvssVector":"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","cvssSource":"cna","ingestedAt":"2026-10-21T16:05:17.683Z","slug":"CVE-2026-113795","body":"## Overview\n\n### Impact\n\nAn attacker who uses this vulnerability can craft a PDF which leads to large memory consumption. This requires accessing any stream with a large amount of filters or multiple filters which pass around large amounts of data.\n\n### Patches\n\nThis has been fixed in [pypdf==6.20.0](https://github.com/py-pdf/pypdf/releases/tag/6.20.0).\n\n### Workarounds\n\nIf you cannot upgrade yet, consider applying the changes from PR [#4173](https://github.com/py-pdf/pypdf/pull/4173).\n\n## Affected packages\n\n- `pypdf < 6.20.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `pypdf 6.20.0`","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":33,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}