Vulnerability Description
pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Pypdf Project | Pypdf | < 6.7.5 |
Related Weaknesses (CWE)
References
- https://github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98fPatch
- https://github.com/py-pdf/pypdf/pull/3666Issue TrackingPatch
- https://github.com/py-pdf/pypdf/releases/tag/6.7.5ProductRelease Notes
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852PatchVendor Advisory
FAQ
What is CVE-2026-28804?
CVE-2026-28804 is a vulnerability with a CVSS score of 5.3 (MEDIUM). pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream ...
How severe is CVE-2026-28804?
CVE-2026-28804 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-28804?
Check the references section above for vendor advisories and patch information. Affected products include: Pypdf Project Pypdf.