{"id":"CVE-2026-119206","aliases":["GHSA-42gh-23hr-vphw"],"url":"https://o3.security/vulnerability/CVE-2026-119206","summary":"pypdf: Possible long runtimes when retrieving page labels","details":"pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can take excessive time to retrieve page labels from a crafted PDF containing a flat page-label number tree with many ranges. The page_labels property resolves each page independently and repeatedly scans the same /Nums array from the beginning, causing work to grow with both the page count and the number of label ranges. This issue is fixed in version 6.21.3.","published":"2026-10-29T20:37:15.057Z","modified":"2026-10-31T02:47:37.487270065Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"pypdf","fixedVersion":"6.21.3"}],"fix":{"url":"https://github.com/py-pdf/pypdf/commit/b891fef37000cd86baa6e9848a3387d080b3b03e","label":"py-pdf/pypdf@b891fef"},"references":[{"type":"WEB","url":"https://github.com/py-pdf/pypdf/releases/tag/6.21.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119206.json"},{"type":"ADVISORY","url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-42gh-23hr-vphw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119206"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/commit/b891fef37000cd86baa6e9848a3387d080b3b03e"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/pull/4251"},{"type":"PACKAGE","url":"https://github.com/py-pdf/pypdf"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-31T02:47:37.487270065Z"}}