High severity7.5NVD Advisory· Published Mar 27, 2026· Updated Apr 1, 2026
CVE-2026-33699
CVE-2026-33699
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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
pypdfPyPI | < 6.9.2 | 6.9.2 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- github.com/py-pdf/pypdf/pull/3693nvdIssue TrackingPatchWEB
- github.com/py-pdf/pypdf/security/advisories/GHSA-87mj-5ggw-8qc3nvdPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-87mj-5ggw-8qc3ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-33699ghsaADVISORY
- github.com/py-pdf/pypdf/releases/tag/6.9.2nvdProductRelease NotesWEB
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