Moderate severityGHSA Advisory· Published Jun 16, 2026· Updated Jun 16, 2026
pypdf: Possible infinite loop when processing outlines/bookmarks in writer
CVE-2026-54531
Description
Impact
An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires merging a file with outlines into a writer.
Patches
This has been fixed in pypdf==6.13.0.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3830.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
pypdfPyPI | < 6.13.0 | 6.13.0 |
Affected products
4- osv-coords3 versions
< 0.9.6-r5+ 2 more
- (no CPE)range: < 0.9.6-r5
- (no CPE)range: < 0.9.6-r5
- (no CPE)range: < 6.13.0
Patches
Vulnerability mechanics
References
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