GHSA-qv6h-rv94-w285

pypdf: Possible large memory usage when retrieving Roman page labels

Source: GitHub Advisory Database (reviewed) High CVE-2026-102993

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	pypdf	< 6.17.0	6.17.0

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 consumption. This requires accessing the page labels of a document with large Roman numerals. ### Patches This has been fixed in [pypdf==6.17.0](https://github.com/py-pdf/pypdf/releases/tag/6.17.0). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#4047](https://github.com/py-pdf/pypdf/pull/4047).

References

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

https://github.com/py-pdf/pypdf/security/advisories/GHSA-qv6h-rv94-w285 web
https://nvd.nist.gov/vuln/detail/CVE-2026-102993 advisory
https://github.com/py-pdf/pypdf/pull/4047 web
https://github.com/py-pdf/pypdf/commit/89db7c4fe9315ecc964bfdf05a4e8c4b94175163 web
https://github.com/py-pdf/pypdf package
https://github.com/py-pdf/pypdf/releases/tag/6.17.0 web