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 in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 4.8
- CVSS vector
- CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- EPSS probability
- 0.21%
- CWE
- CWE-834
- Published
- 2026-04-22
- Last modified
- 2026-04-23
Affected products
- py-pdf pypdf
Weakness type
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