{"id":"CVE-2026-22690","aliases":["GHSA-4xc4-762w-m6cg","PYSEC-2026-1829"],"url":"https://o3.security/vulnerability/CVE-2026-22690","summary":"pypdf has possible long runtimes for missing /Root object with large /Size values","details":"pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for missing /Root object with large /Size values. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for actually invalid files. This can be achieved by omitting the /Root entry in the trailer, while using a rather large /Size value. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.","published":"2026-01-10T04:41:20.773Z","modified":"2026-07-15T01:49:15.554296492Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"pypdf","fixedVersion":"6.6.0"}],"fix":{"url":"https://github.com/py-pdf/pypdf/commit/294165726b646bb7799be1cc787f593f2fdbcf45","label":"py-pdf/pypdf@2941657"},"references":[{"type":"WEB","url":"https://github.com/py-pdf/pypdf/releases/tag/6.6.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22690.json"},{"type":"ADVISORY","url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-4xc4-762w-m6cg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22690"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/commit/294165726b646bb7799be1cc787f593f2fdbcf45"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/pull/3594"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:15.554296492Z"}}