{"cve":"CVE-2026-48156","nvd":{"published":"2026-05-28T16:16:29.020","modified":"2026-10-14T20:10:00.190","status":"Analyzed","description":"pypdf is a free and open-source pure-python PDF library. Prior to 6.12.0, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires cross-reference streams with /W [0 0 0] values and large /Size values. This vulnerability is fixed in 6.12.0.","cvss_v4":{"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":5.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","score":3.3},"cwes":["CWE-834"],"references":["https://github.com/py-pdf/pypdf/pull/3791","https://github.com/py-pdf/pypdf/releases/tag/6.12.0","https://github.com/py-pdf/pypdf/security/advisories/GHSA-248m-82v9-q6g6"],"products":["pypdf_project:pypdf"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-48156","score":0.00124,"percentile":0.02112,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-248m-82v9-q6g6","url":"https://osv.dev/vulnerability/GHSA-248m-82v9-q6g6","summary":"pypdf: Possible long runtimes for zero-only width values in cross-reference streamsuntimes for zero-only width values in cross-reference streams","modified":"2026-09-10T03:51:07.304973624Z","packages":[{"ecosystem":"PyPI","name":"pypdf","purl":"pkg:pypi/pypdf","ranges":["<6.12.0"],"fixed":["6.12.0"]}]},{"id":"PYSEC-2026-3004","url":"https://osv.dev/vulnerability/PYSEC-2026-3004","summary":"pypdf: Possible long runtimes for zero-only width values in cross-reference streamsuntimes for zero-only width values in cross-reference streams","modified":"2026-07-13T16:33:08.822851445Z","packages":[{"ecosystem":"PyPI","name":"pypdf","purl":"pkg:pypi/pypdf","ranges":["<6.12.0"],"fixed":["6.12.0"]}]}],"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."]}