GHSA-87mj-5ggw-8qc3

pypdf: Possible infinite loop during recovery attempts in DictionaryObject.read_from_stream

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-33699

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	pypdf	< 6.9.2	6.9.2

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 an infinite loop. This requires reading a file in non-strict mode. ### Patches This has been fixed in [pypdf==6.9.2](https://github.com/py-pdf/pypdf/releases/tag/6.9.2). ### Workarounds If users cannot upgrade yet, consider applying the changes from PR [#3693](https://github.com/py-pdf/pypdf/pull/3693).

References

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

https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3 web
https://nvd.nist.gov/vuln/detail/CVE-2026-33699 advisory
https://github.com/py-pdf/pypdf/pull/3693 web
https://github.com/py-pdf/pypdf package
https://github.com/py-pdf/pypdf/releases/tag/6.9.2 web