{"cve":"CVE-2026-28351","nvd":{"published":"2026-02-27T21:16:19.177","modified":"2026-06-17T10:28:27.863","status":"Analyzed","description":"pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.4, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream using the RunLengthDecode filter. This has been fixed in pypdf 6.7.4. As a workaround, consider applying the changes from PR #3664.","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:L","score":5.3},"cwes":["CWE-400"],"references":["https://github.com/py-pdf/pypdf/commit/f309c6003746414dc7b5048c19e6d879ff2dc858","https://github.com/py-pdf/pypdf/pull/3664","https://github.com/py-pdf/pypdf/releases/tag/6.7.4","https://github.com/py-pdf/pypdf/security/advisories/GHSA-f2v5-7jq9-h8cg"],"products":["pypdf_project:pypdf"],"source":"nvd","synced_at":"2026-10-19T22:24:17.937441719+00:00"},"epss":{"cve":"CVE-2026-28351","score":0.0048,"percentile":0.41454,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-f2v5-7jq9-h8cg","url":"https://osv.dev/vulnerability/GHSA-f2v5-7jq9-h8cg","summary":"pypdf: Manipulated RunLengthDecode streams can exhaust RAM","modified":"2026-09-10T03:50:34.825129703Z","packages":[{"ecosystem":"PyPI","name":"pypdf","purl":"pkg:pypi/pypdf","ranges":["<6.7.4"],"fixed":["6.7.4"]}]},{"id":"PYSEC-2026-3017","url":"https://osv.dev/vulnerability/PYSEC-2026-3017","summary":"pypdf: Manipulated RunLengthDecode streams can exhaust RAM","modified":"2026-07-13T16:33:05.716208599Z","packages":[{"ecosystem":"PyPI","name":"pypdf","purl":"pkg:pypi/pypdf","ranges":["<6.7.4"],"fixed":["6.7.4"]}]}],"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."]}