Vulnerability Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.8.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing a content stream with a rather large /Length value, regardless of the actual data length inside the stream. This vulnerability is fixed in 6.8.0.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Pypdf Project | Pypdf | < 6.8.0 |
Related Weaknesses (CWE)
References
- https://github.com/py-pdf/pypdf/pull/3675Issue TrackingPatch
- https://github.com/py-pdf/pypdf/releases/tag/6.8.0ProductRelease Notes
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-hqmh-ppp3-xvm7PatchVendor Advisory
FAQ
What is CVE-2026-31826?
CVE-2026-31826 is a vulnerability with a CVSS score of 5.5 (MEDIUM). pypdf is a free and open-source pure-python PDF library. Prior to 6.8.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing a content stre...
How severe is CVE-2026-31826?
CVE-2026-31826 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-2026-31826?
Check the references section above for vendor advisories and patch information. Affected products include: Pypdf Project Pypdf.