{"cve":"CVE-2026-59937","nvd":{"published":"2026-07-08T18:16:34.963","modified":"2026-10-25T17:10:00.197","status":"Analyzed","description":"pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with repeated malformed cross-reference streams that cause pypdf to spend long runtimes recovering broken cross-reference table entries. This issue is fixed in version 6.14.0.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://github.com/py-pdf/pypdf/commit/b5fc5aa714f4b696fb9b1deaa35a9e4a4eb50dae","https://github.com/py-pdf/pypdf/pull/3887","https://github.com/py-pdf/pypdf/releases/tag/6.14.0","https://github.com/py-pdf/pypdf/security/advisories/GHSA-55h5-xmcq-c37v"],"products":["pypdf_project:pypdf"],"source":"nvd","synced_at":"2026-10-25T17:50:06.907763985+00:00"},"epss":{"cve":"CVE-2026-59937","score":0.0062,"percentile":0.49391,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-55h5-xmcq-c37v","url":"https://osv.dev/vulnerability/GHSA-55h5-xmcq-c37v","summary":"pypdf: Possible long runtimes for repeated malformed cross-reference entries ","modified":"2026-09-10T03:50:12.272620075Z","packages":[{"ecosystem":"PyPI","name":"pypdf","purl":"pkg:pypi/pypdf","ranges":["<6.14.0"],"fixed":["6.14.0"]}]},{"id":"PYSEC-2026-3610","url":"https://osv.dev/vulnerability/PYSEC-2026-3610","summary":"pypdf: Possible long runtimes for repeated malformed cross-reference entries ","modified":"2026-08-04T14:30:26.214155440Z","packages":[{"ecosystem":"PyPI","name":"pypdf","purl":"pkg:pypi/pypdf","ranges":["<6.14.0"],"fixed":["6.14.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}