Vulnerability in Py-pdf Pypdf
CVE-2026-41313
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value…
EPSS: 0.002 (11.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Py-pdf Pypdf — versions < 6.10.2
- Pypdf_project Pypdf
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-41313?
- CVE-2026-41313 is a medium-severity vulnerability in Py-pdf Pypdf, classified under Excessive Iteration. CVSS score: 6.5/10. Published 2026-04-22.
- How severe is CVE-2026-41313?
- Medium severity. CVSS v3 base score is 6.5 out of 10.