Vulnerability Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires parsing the /ToUnicode entry of a font with unusually large values, for example during text extraction. This vulnerability is fixed in 6.7.1.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Pypdf Project | Pypdf | < 6.7.1 |
Related Weaknesses (CWE)
References
- https://github.com/py-pdf/pypdf/commit/77d7b8d7cfbe8dd179858dfa42666f73fc6e57a2Patch
- https://github.com/py-pdf/pypdf/pull/3646Issue TrackingPatch
- https://github.com/py-pdf/pypdf/releases/tag/6.7.1ProductRelease Notes
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-wgvp-vg3v-2xq3PatchVendor Advisory
FAQ
What is CVE-2026-27025?
CVE-2026-27025 is a vulnerability with a CVSS score of 5.5 (MEDIUM). pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This require...
How severe is CVE-2026-27025?
CVE-2026-27025 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-27025?
Check the references section above for vendor advisories and patch information. Affected products include: Pypdf Project Pypdf.