py-pdf/pypdf · Security
pypdf: Possible infinite loop for not terminated inline images
- GHSA ID
- GHSA-5xf7-4p34-54qr
- CVE ID
- CVE-2026-59936
- Severity
- high
- Published
- Updated
- CVSS v4
- 8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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 parsing the content stream of a page with a not terminated inline image, as done when extracting the page text for example.
Patches
This has been fixed in pypdf==6.14.1.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3891.
CWEs
- CWE-400 · Uncontrolled Resource Consumption
- CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-5xf7-4p34-54qr ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-59936 ↗
- https://github.com/py-pdf/pypdf/pull/3891 ↗
- https://github.com/py-pdf/pypdf/commit/ec3b14596186c40caca7cf8ab9b2155203e01b5b ↗
- https://github.com/py-pdf/pypdf/releases/tag/6.14.1 ↗
- https://github.com/advisories/GHSA-5xf7-4p34-54qr ↗