CVSS 4.0
6.9 mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NCVE-2026-41168
Medium (6.9) in pypdf project pypdf. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in pypdf 6.10.1.
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.1 can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large `/Size` values or object streams with wrong large `/N` values. This has been fixed in pypdf 6.10.1. As a workaround, one may apply the changes from the patch manually.
Severity
CVSS 3.1
5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-31)
- CWE
- CWE-834
- Published
- Modified
- Record from
- the NVD, synced
Affected
- pypdf_project:pypdf
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-jj6c-8h6c-hppx | PyPI | pypdf | <6.10.1 | 6.10.1 |
| PYSEC-2026-3021 | PyPI | pypdf | <6.10.1 | 6.10.1 |