py-pdf/pypdf · Security
pypdf: Possible long runtimes for wrong size values in incremental mode
- GHSA ID
- GHSA-4pxv-j86v-mhcw
- CVE ID
- CVE-2026-41313
- Severity
- medium
- Published
- Updated
- CVSS
- 6.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CVSS v3
- 6.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CVSS v4
- 6.8 · CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Description
Impact
An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer /Size value in incremental mode.
Patches
This has been fixed in pypdf==6.10.2.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3735.
CWEs
- CWE-834 · Excessive Iteration
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-4pxv-j86v-mhcw ↗
- https://github.com/py-pdf/pypdf/pull/3735 ↗
- https://github.com/py-pdf/pypdf/releases/tag/6.10.2 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-41313 ↗
- https://github.com/py-pdf/pypdf/commit/c50a0104cf083356f7c7f5d61410466a57f5c88a ↗
- https://github.com/advisories/GHSA-4pxv-j86v-mhcw ↗