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PYSEC-2026-3012
pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream
Quick fix
PYSEC-2026-3012 — pypdf: upgrade to the fixed version with the command below.
pip install --upgrade 'pypdf>=6.9.2'Details
### Impact
An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode.
### Patches
This has been fixed in [pypdf==6.9.2](https://github.com/py-pdf/pypdf/releases/tag/6.9.2).
### Workarounds
If users cannot upgrade yet, consider applying the changes from PR [#3693](https://github.com/py-pdf/pypdf/pull/3693).
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-33699[ADVISORY]
- https://github.com/py-pdf/pypdf/pull/3693[WEB]
- https://github.com/py-pdf/pypdf[PACKAGE]
- https://github.com/py-pdf/pypdf/releases/tag/6.9.2[WEB]
- https://pypi.org/project/pypdf[PACKAGE]
- https://github.com/advisories/GHSA-87mj-5ggw-8qc3[ADVISORY]