{"id":"CVE-2026-28351","aliases":["GHSA-f2v5-7jq9-h8cg","PYSEC-2026-3017"],"url":"https://o3.security/vulnerability/CVE-2026-28351","summary":"Manipulated RunLengthDecode streams can exhaust RAM","details":"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.","published":"2026-02-27T20:59:16.839Z","modified":"2026-07-15T01:49:17.519325086Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"pypdf","fixedVersion":"6.7.4"}],"fix":{"url":"https://github.com/py-pdf/pypdf/commit/f309c6003746414dc7b5048c19e6d879ff2dc858","label":"py-pdf/pypdf@f309c60"},"references":[{"type":"WEB","url":"https://github.com/py-pdf/pypdf/releases/tag/6.7.4"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28351.json"},{"type":"ADVISORY","url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-f2v5-7jq9-h8cg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-28351"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/commit/f309c6003746414dc7b5048c19e6d879ff2dc858"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/pull/3664"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:17.519325086Z"}}