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PYSEC-2026-3611
pypdf: Possible large memory usage for wrong image dimensions
Quick fix
PYSEC-2026-3611 — pypdf: upgrade to the fixed version with the command below.
pip install --upgrade 'pypdf>=6.14.0'Details
### Impact
An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires loading images where the declared size values are much too large compared to the actual data.
### Patches
This has been fixed in [pypdf==6.14.0](https://github.com/py-pdf/pypdf/releases/tag/6.14.0).
### Workarounds
If you cannot upgrade yet, consider applying the changes from PR [#3888](https://github.com/py-pdf/pypdf/pull/3888).
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-5qjq-93h5-hrgp[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-59938[ADVISORY]
- https://github.com/py-pdf/pypdf/pull/3888[WEB]
- https://github.com/py-pdf/pypdf/commit/c64583be16b8e8763d8777075f8ecbf382014b7a[WEB]
- https://github.com/py-pdf/pypdf[PACKAGE]
- https://github.com/py-pdf/pypdf/releases/tag/6.14.0[WEB]
- https://pypi.org/project/pypdf[PACKAGE]
- https://github.com/advisories/GHSA-5qjq-93h5-hrgp[ADVISORY]