{"id":"CVE-2026-33699","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-33699","generatedAt":"2026-10-28T11:56:28.714Z","title":"Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop.","description":"pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.","published":"2026-03-27T01:16:19.000Z","lastModified":"2026-06-17T10:37:57.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":4.6,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-835"],"affected":["pypdf project/pypdf"],"epss":{"score":0.00472,"percentile":0.40666,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.47%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/py-pdf/pypdf/pull/3693","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/py-pdf/pypdf/releases/tag/6.9.2","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3","tags":["Patch","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-33699","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}