https://db.gcve.eu/rss/recent/all/10 Most recent entries from all 2026-10-22T10:38:22.764005+00:00 Vulnerability-Lookup info@gcve.eu python-feedgen Contains only the most 10 recent entries. https://db.gcve.eu/vuln/fkie_cve-2026-113793 fkie_cve-2026-113793 2026-10-22T10:38:22.783969+00:00

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, removing an object from a crafted cyclic PDF tree, such as an outline item, can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.

 https://db.gcve.eu/vuln/ghsa-9mx8-4j7g-633p GHSA-9mx8-4j7g-633p — pypdf: Possible infinite loop when removing tree items 2026-10-22T10:38:22.784028+00:00

Affected: PyPI: pypdf

### Impact

An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires removing an object from a tree, for example an outline item.

### Patches

This has been fixed in [pypdf==6.20.1](https://github.com/py-pdf/pypdf/releases/tag/6.20.1).

### Workarounds

If you cannot upgrade yet, consider applying the changes from PR [#4188](https://github.com/py-pdf/pypdf/pull/4188).