py-pdf/pypdf · Security
pypdf: Possible long runtimes with large amount of embedded files
- GHSA ID
- GHSA-v247-6f48-mgcj
- CVE ID
- CVE-2026-102999
- Severity
- high
- Published
- Updated
- CVSS v4
- 8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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 accessing the embedded files through the dictionary-based API.
Patches
This has been fixed in pypdf==6.19.0.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #4081.
CWEs
- CWE-400 · Uncontrolled Resource Consumption
- CWE-407 · Inefficient Algorithmic Complexity
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-v247-6f48-mgcj ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-102999 ↗
- https://github.com/py-pdf/pypdf/pull/4081 ↗
- https://github.com/py-pdf/pypdf/commit/6b10556d13609a68f9ed18bb29fdd8bba88eb2c3 ↗
- https://github.com/py-pdf/pypdf/releases/tag/6.19.0 ↗
- https://github.com/advisories/GHSA-v247-6f48-mgcj ↗