GHSA-6c7f-9265-g8fw
pypdf: Possible long runtimes for repeated references to the same missing object
Packages
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 loading relevant parts of a file (like their pages) where the same, but non-existent indirect object is referenced multiple times.
### Patches
This has been fixed in [pypdf==6.21.2](https://github.com/py-pdf/pypdf/releases/tag/6.21.2).
### Workarounds
If you cannot upgrade yet, consider applying the changes from PR [#4240](https://github.com/py-pdf/pypdf/pull/4240).
References
External links from the advisory. They lead to third-party sites.