MEDIUM

GHSA-cj93-chg6-vgv8

pypdf: Possible large memory usage for large offsets for layout mode text

Details

### Impact

An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets.

### Patches

This has been fixed in [pypdf==6.12.0](https://github.com/py-pdf/pypdf/releases/tag/6.12.0).

### Workarounds

If developers are unable to immediately upgrade, they should consider applying the changes from PR [#3790](https://github.com/py-pdf/pypdf/pull/3790).

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI / pypdf

Introduced in: 0 Fixed in: 6.12.0

Fix pip install --upgrade 'pypdf>=6.12.0'

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-cj93-chg6-vgv8 [WEB]
https://nvd.nist.gov/vuln/detail/CVE-2026-48155 [ADVISORY]
https://github.com/py-pdf/pypdf/pull/3790 [WEB]
https://github.com/py-pdf/pypdf [PACKAGE]
https://github.com/py-pdf/pypdf/releases/tag/6.12.0 [WEB]