{"cve":"CVE-2026-113790","nvd":{"published":"2026-10-21T16:17:26.880","modified":"2026-10-22T16:46:48.920","status":"Undergoing Analysis","description":"pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF containing arrays or dictionaries with many elements, causing parsing to consume large amounts of memory. This issue is fixed in version 6.21.0.","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-400","CWE-770"],"references":["https://github.com/py-pdf/pypdf/commit/18bd2981a74479483a0b9507602c58a63d6c9b12","https://github.com/py-pdf/pypdf/pull/4218","https://github.com/py-pdf/pypdf/releases/tag/6.21.0","https://github.com/py-pdf/pypdf/security/advisories/GHSA-f54x-cmq8-qg57"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-113790","score":0.00392,"percentile":0.3303,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-f54x-cmq8-qg57","url":"https://osv.dev/vulnerability/GHSA-f54x-cmq8-qg57","summary":"pypdf: Possible large memory usage when parsing arrays and dictionaries","modified":"2026-10-22T17:00:04.224392742Z","packages":[{"ecosystem":"PyPI","name":"pypdf","purl":"pkg:pypi/pypdf","ranges":["<6.21.0"],"fixed":["6.21.0"]}]}],"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."]}