CVE-2026-41313

UNKNOWN 0.0

pypdf: Possible long runtimes for wrong size values in incremental mode

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-834
Vendor	py-pdf
Product	pypdf
Published	Apr 22, 2026

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Affected Versions

py-pdf / pypdf

< 6.10.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-4pxv-j86v-mhcw github.com: https://github.com/py-pdf/pypdf/pull/3735 github.com: https://github.com/py-pdf/pypdf/commit/c50a0104cf083356f7c7f5d61410466a57f5c88a github.com: https://github.com/py-pdf/pypdf/releases/tag/6.10.2