{"id":"CVE-2026-113791","aliases":["GHSA-cgf9-327m-v77c"],"url":"https://o3.security/vulnerability/CVE-2026-113791","summary":"pypdf: Possible large memory usage when parsing content streams","details":"### Impact\n\nAn attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing content streams with many small operations.\n\n### Patches\n\nThis has been fixed in [pypdf==6.21.0](https://github.com/py-pdf/pypdf/releases/tag/6.21.0).\n\n### Workarounds\n\nIf you cannot upgrade yet, consider applying the changes from PR [#4218](https://github.com/py-pdf/pypdf/pull/4218).","published":"2026-10-21T15:37:50.527Z","modified":"2026-10-22T02:49:06.947870094Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"pypdf","fixedVersion":"6.21.0"}],"fix":{"url":"https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12","label":"py-pdf/pypdf@18bd298"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113791.json"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/pull/4218"},{"type":"WEB","url":"https://github.com/py-pdf/pypdf/releases/tag/6.21.0"},{"type":"ADVISORY","url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-cgf9-327m-v77c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113791"},{"type":"PACKAGE","url":"https://github.com/py-pdf/pypdf"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-22T02:49:06.947870094Z"}}