{"cve":"CVE-2026-102996","nvd":{"published":"2026-09-30T21:17:06.863","modified":"2026-10-05T15:13:17.070","status":"Analyzed","description":"pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF can provide a TrueType or Type1 simple font with an unusually large /Widths array, causing pypdf/_font.py Font._collect_tt_t1_character_widths to process entries beyond the 256 character codes meaningful for a simple font and consume excessive memory during operations such as text extraction. This issue is fixed in version 6.18.1.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7},"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/0fb26eb8cdd01c44b3b2c9fe8329751be2f7cfd5","https://github.com/py-pdf/pypdf/pull/4072","https://github.com/py-pdf/pypdf/releases/tag/6.18.1","https://github.com/py-pdf/pypdf/security/advisories/GHSA-g9cg-prrw-2r8q"],"products":["pypdf_project:pypdf"],"source":"nvd","synced_at":"2026-10-19T22:57:46.668721662+00:00"},"epss":{"cve":"CVE-2026-102996","score":0.0034,"percentile":0.27278,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-g9cg-prrw-2r8q","url":"https://osv.dev/vulnerability/GHSA-g9cg-prrw-2r8q","summary":"pypdf: Possible large memory usage when parsing font data","modified":"2026-10-01T17:55:49.593652911Z","packages":[{"ecosystem":"PyPI","name":"pypdf","purl":"pkg:pypi/pypdf","ranges":["<6.18.1"],"fixed":["6.18.1"]}]},{"id":"PYSEC-2026-4155","url":"https://osv.dev/vulnerability/PYSEC-2026-4155","summary":"pypdf: Possible large memory usage when parsing font data","modified":"2026-10-01T17:45:17.849117097Z","packages":[{"ecosystem":"PyPI","name":"pypdf","purl":"pkg:pypi/pypdf","ranges":["<6.18.1"],"fixed":["6.18.1"]}]}],"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."]}