GHSA-v247-6f48-mgcj

pypdf: Possible long runtimes with large amount of embedded files

Source: GitHub Advisory Database (reviewed) High CVE-2026-102999

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	pypdf	< 6.19.0	6.19.0

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 long runtimes. This requires accessing the embedded files through the dictionary-based API. ### Patches This has been fixed in [pypdf==6.19.0](https://github.com/py-pdf/pypdf/releases/tag/6.19.0). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#4081](https://github.com/py-pdf/pypdf/pull/4081).

References

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

https://github.com/py-pdf/pypdf/security/advisories/GHSA-v247-6f48-mgcj web
https://nvd.nist.gov/vuln/detail/CVE-2026-102999 advisory
https://github.com/py-pdf/pypdf/pull/4081 web
https://github.com/py-pdf/pypdf/commit/6b10556d13609a68f9ed18bb29fdd8bba88eb2c3 web
https://github.com/py-pdf/pypdf package
https://github.com/py-pdf/pypdf/releases/tag/6.19.0 web