MEDIUM

GHSA-fwg2-594c-jp42

pypdf: Possible long runtimes/large memory usage for large CID font width ranges

Quick fix

GHSA-fwg2-594c-jp42 — pypdf: upgrade to the fixed version with the command below.

pip install --upgrade 'pypdf>=6.15.0'

Details

### Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires parsing the font width entries of a font with unusually large values, for example during text extraction.

### Patches

This has been fixed in [pypdf==6.15.0](https://github.com/py-pdf/pypdf/releases/tag/6.15.0).

### Workarounds

If you cannot upgrade yet, consider applying the changes from PR [#3946](https://github.com/py-pdf/pypdf/pull/3946).

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI / pypdf

Introduced in: 0 Fixed in: 6.15.0

Fix pip install --upgrade 'pypdf>=6.15.0'

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-fwg2-594c-jp42 [WEB]
https://github.com/py-pdf/pypdf/pull/3946 [WEB]
https://github.com/py-pdf/pypdf/commit/51cb6acf9e8a35b77e90b4d87d28fe3e1416d7d7 [WEB]
https://github.com/py-pdf/pypdf [PACKAGE]
https://github.com/py-pdf/pypdf/releases/tag/6.15.0 [WEB]