{"id":"CVE-2026-27628","aliases":["GHSA-2rw7-x74f-jg35","PYSEC-2026-3005"],"url":"https://o3.security/vulnerability/CVE-2026-27628","summary":"pypdf has a possible infinite loop when loading circular /Prev entries in cross-reference streams","details":"pypdf is a free and open-source pure-python PDF library. Prior to 6.7.2, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading the file. This has been fixed in pypdf 6.7.2. As a workaround, one may apply the patch manually.","published":"2026-02-25T02:45:37.543Z","modified":"2026-08-27T14:10:52.041841698Z","cvss":null,"epss":{"score":0.00346,"percentile":0.27138,"asOf":"2026-08-25"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"pypdf","fixedVersion":"6.7.2"}],"fix":{"url":"https://github.com/py-pdf/pypdf/commit/f0a462d36971cf077d74492a348d0d06fd60ea4d","label":"py-pdf/pypdf@f0a462d"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27628.json"},{"type":"ADVISORY","url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-2rw7-x74f-jg35"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27628"},{"type":"REPORT","url":"https://github.com/py-pdf/pypdf/issues/3654"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/commit/f0a462d36971cf077d74492a348d0d06fd60ea4d"},{"type":"PACKAGE","url":"https://github.com/py-pdf/pypdf"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T14:10:52.041841698Z"}}