{"id":"CVE-2026-24688","aliases":["GHSA-2q4j-m29v-hq73","PYSEC-2026-1827"],"title":"pypdf has possible Infinite Loop when processing outlines/bookmarks","summary":"pypdf has possible Infinite Loop when processing outlines/bookmarks","severity":"medium","vendor":"pypdf","product":"pypdf","ecosystem":"pip","affected":["pypdf < 6.6.2"],"patched":["pypdf 6.6.2"],"published":"2026-01-26","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:50:32.300137224Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-2q4j-m29v-hq73","references":[{"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-2q4j-m29v-hq73"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24688"},{"url":"https://github.com/py-pdf/pypdf/pull/3610"},{"url":"https://github.com/py-pdf/pypdf/commit/b1282f8dcdc1a7b41ceab6740ffddfdf31b1fec1"},{"url":"https://github.com/py-pdf/pypdf"},{"url":"https://github.com/py-pdf/pypdf/releases/tag/6.6.2"}],"tags":["osv","pip","exploit-available"],"epss":0.00412,"epssPercentile":0.35148,"exploits":{"github":2,"githubRepos":["https://github.com/JoakimBulow/CVE-2026-24688","https://github.com/Fomovet/cve-2026-24688"],"checkedAt":"2026-09-23T07:13:55.812Z"},"exploitAvailable":true,"ingestedAt":"2026-07-08T18:25:44.592Z","slug":"CVE-2026-24688","body":"## Overview\n\n### Impact\n\nAn attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks.\n\n### Patches\n\nThis has been fixed in [pypdf 6.6.2](https://github.com/py-pdf/pypdf/releases/tag/6.6.2).\n\n### Workarounds\n\nIf projects cannot upgrade yet, consider applying the changes from PR [#3610](https://github.com/py-pdf/pypdf/pull/3610).\n\n## Affected packages\n\n- `pypdf < 6.6.2`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `pypdf 6.6.2`","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":27.5,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":5031,"id":"CVE-2026-24688","ts":1788887229762,"field":"exploit_available","old":"false","new":"true"},{"seq":3914,"id":"CVE-2026-24688","ts":1788886360478,"field":"exploit_available","old":"true","new":"false"},{"seq":2736,"id":"CVE-2026-24688","ts":1788883026332,"field":"exploit_available","old":"false","new":"true"},{"seq":1765,"id":"CVE-2026-24688","ts":1788882430269,"field":"exploit_available","old":"true","new":"false"},{"seq":871,"id":"CVE-2026-24688","ts":1788881863268,"field":"exploit_available","old":"false","new":"true"}]}