MEDIUM

GHSA-5qjq-93h5-hrgp

pypdf: Possible large memory usage for wrong image dimensions

Quick fix

GHSA-5qjq-93h5-hrgp — 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

PyPI / pypdf

Introduced in: 0 Fixed in: 6.14.0

Fix pip install --upgrade 'pypdf>=6.14.0'

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]