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PYSEC-2026-3613
pypdf: Possible infinite loop for not terminated inline images (ASCII85 and ASCIIHex filter)
Quick fix
PYSEC-2026-3613 — pypdf: upgrade to the fixed version with the command below.
pip install --upgrade 'pypdf>=6.14.2'Details
### 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. It only affects the ASCII85 and ASCIIHex filters.
### Patches
This has been fixed in [pypdf==6.14.2](https://github.com/py-pdf/pypdf/releases/tag/6.14.2).
### Workarounds
If you cannot upgrade yet, consider applying the changes from PR [#3892](https://github.com/py-pdf/pypdf/pull/3892).
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-g867-7843-wf8q[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-59935[ADVISORY]
- https://github.com/py-pdf/pypdf/pull/3892[WEB]
- https://github.com/py-pdf/pypdf/commit/5a33a46416aa1ae6c025ff90a3cca57631fdafd2[WEB]
- https://github.com/py-pdf/pypdf[PACKAGE]
- https://github.com/py-pdf/pypdf/releases/tag/6.14.2[WEB]
- https://pypi.org/project/pypdf[PACKAGE]
- https://github.com/advisories/GHSA-g867-7843-wf8q[ADVISORY]