py-pdf/pypdf · Security
pypdf has possible Infinite Loop when processing outlines/bookmarks
- GHSA ID
- GHSA-2q4j-m29v-hq73
- CVE ID
- CVE-2026-24688
- Severity
- medium
- Published
- Updated
- CVSS v4
- 5.1 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Description
Impact
An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks.
Patches
This has been fixed in pypdf 6.6.2.
Workarounds
If projects cannot upgrade yet, consider applying the changes from PR #3610.
CWEs
- CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-2q4j-m29v-hq73 ↗
- https://github.com/py-pdf/pypdf/pull/3610 ↗
- https://github.com/py-pdf/pypdf/commit/b1282f8dcdc1a7b41ceab6740ffddfdf31b1fec1 ↗
- https://github.com/py-pdf/pypdf/releases/tag/6.6.2 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-24688 ↗
- https://github.com/advisories/GHSA-2q4j-m29v-hq73 ↗