GHSA-wjqc-6w8f-h24c

pypdf: Manipulated XMP metadata streams can exhaust RAM

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-48735

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	pypdf	< 6.12.1	6.12.1

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 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).

References

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

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