{"cve":"CVE-2026-113793","nvd":{"published":"2026-10-21T16:17:27.327","modified":"2026-10-22T16:46:48.920","status":"Undergoing Analysis","description":"pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, removing an object from a crafted cyclic PDF tree, such as an outline item, can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.","cvss_v4":{"vector":"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","score":6.0},"cvss_v3":null,"cwes":["CWE-835"],"references":["https://github.com/py-pdf/pypdf/commit/c9c35b4471c2eb5fe078094f6c816e69d4ed25a0","https://github.com/py-pdf/pypdf/pull/4188","https://github.com/py-pdf/pypdf/releases/tag/6.20.1","https://github.com/py-pdf/pypdf/security/advisories/GHSA-9mx8-4j7g-633p"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-113793","score":0.00466,"percentile":0.40056,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-9mx8-4j7g-633p","url":"https://osv.dev/vulnerability/GHSA-9mx8-4j7g-633p","summary":"pypdf: Possible infinite loop when removing tree items","modified":"2026-10-21T17:00:06.245541968Z","packages":[{"ecosystem":"PyPI","name":"pypdf","purl":"pkg:pypi/pypdf","ranges":["<6.20.1"],"fixed":["6.20.1"]}]}],"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."]}