Kurz gesagt
- CVE-2026-84309 ist eine Schwachstelle (MITTEL (CVSS 5.5)) in pypdf, pypdf (pypdf project).
- Wahrscheinlichkeit einer Ausnutzung in den nächsten 30 Tagen (EPSS): 0.19%, höher als bei 8.3% aller Schwachstellen.
- Abhilfe: auf 6.16.0 oder neuer aktualisieren.
| Package | Affected versions | Patched versions |
|---|
| pypdf PyPI | < 6.16.0
| 6.16.0
|
| pypdf | < 6.16.0
| 6.16.0
|
Description
Impact
An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires a (usually writing) code path where TreeObject.insert_child is involved.
Patches
This has been fixed in pypdf==6.16.0.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3964.
NVD description
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.0, an attacker can craft a PDF whose cyclic tree structure causes pypdf/generic/_data_structures.py TreeObject.insert_child to follow /Next links indefinitely when a writing code path inserts a child, producing an infinite loop. This issue is fixed in version 6.16.0.
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site free