GHSA-5qjq-93h5-hrgp

pypdf: Possible large memory usage for wrong image dimensions

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-59938

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	pypdf	< 6.14.0	6.14.0

Details

As written in the advisory (Markdown source, shown as plain text).

### 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).

References

External links from the advisory. They lead to third-party sites.

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