MEDIUM

GHSA-wjqc-6w8f-h24c

pypdf: Manipulated XMP metadata streams can exhaust RAM

Details

### Impact

An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing large XMP metadata, possibly with lots of unnecessary elements.

### Patches This has been fixed in [pypdf==6.12.1](https://github.com/py-pdf/pypdf/releases/tag/6.12.1).

### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3796](https://github.com/py-pdf/pypdf/pull/3796).

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI / pypdf

Introduced in: 0 Fixed in: 6.12.1

Fix pip install --upgrade 'pypdf>=6.12.1'

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-wjqc-6w8f-h24c [WEB]
https://nvd.nist.gov/vuln/detail/CVE-2026-48735 [ADVISORY]
https://github.com/py-pdf/pypdf/pull/3796 [WEB]
https://github.com/py-pdf/pypdf [PACKAGE]
https://github.com/py-pdf/pypdf/releases/tag/6.12.1 [WEB]