Vulnerability Description
pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file in non-strict mode. This has been fixed in pypdf 6.9.2. If users cannot upgrade yet, consider applying the changes from the patch manually.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Pypdf Project | Pypdf | < 6.9.2 |
Related Weaknesses (CWE)
References
- https://github.com/py-pdf/pypdf/pull/3693Issue TrackingPatch
- https://github.com/py-pdf/pypdf/releases/tag/6.9.2ProductRelease Notes
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3PatchVendor Advisory
FAQ
What is CVE-2026-33699?
CVE-2026-33699 is a vulnerability with a CVSS score of 7.5 (HIGH). pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.2 have a vulnerability in which an attacker can craft a PDF which leads to an infinite loop. This requires reading a file...
How severe is CVE-2026-33699?
CVE-2026-33699 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33699?
Check the references section above for vendor advisories and patch information. Affected products include: Pypdf Project Pypdf.