VDB
CVE-2026-54651
CVE-2026-54651
PUBLISHED
CVSS 6.9 MEDIUM
Reported by GitHub_M · Published June 22, 2026
pypdf is a free and open-source pure-python PDF library. Prior to 6.13.1, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires merging a file with threads/articles into a writer. This vulnerability is fixed in 6.13.1.
Risk Scores
CVSS 4.0
6.9
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| py-pdf | pypdf | < 6.13.1 |
| PyPI | pypdf | 0 |
| py-pdf | pypdf | < 6.13.1, < 6.13.1, < 6.13.1 |
Timeline
- Jun 22, 2026 CVE Published
- Jun 23, 2026 EPSS Score
- Jun 23, 2026 Coalition ESS Score
- Jun 24, 2026 Security Advisory
- Aug 7, 2026 EPSS Score
- Aug 24, 2026 EPSS Score
- Aug 27, 2026 EPSS Score
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-g9xf-7f8q-9mcj x_refsource_CONFIRM
- https://github.com/py-pdf/pypdf/pull/3839 x_refsource_MISC
- https://github.com/py-pdf/pypdf/releases/tag/6.13.1 x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-54651 advisory
- https://github.com/advisories/GHSA-g9xf-7f8q-9mcj advisory