GHSA-55h5-xmcq-c37v
pypdf: Possible long runtimes for repeated malformed cross-reference entries
At a glance
- Published
- Updated
- CVE
- CVE-2026-59937
- Aliases
- PYSEC-2026-3610
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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 cross-reference streams with repeated malformed cross-reference streams. ### Patches This has been fixed in [pypdf==6.14.0](https://github.com/py-pdf/pypdf/releases/tag/6.14.0). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3887](https://github.com/py-pdf/pypdf/pull/3887).
Affected packages
| Package | Versions |
|---|---|
| PyPI · pypdf | introduced 0, fixed 6.14.0 |
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-55h5-xmcq-c37v WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-59937 ADVISORY
- https://github.com/py-pdf/pypdf/pull/3887 WEB
- https://github.com/py-pdf/pypdf/commit/b5fc5aa714f4b696fb9b1deaa35a9e4a4eb50dae WEB
- https://github.com/py-pdf/pypdf PACKAGE
- https://github.com/py-pdf/pypdf/releases/tag/6.14.0 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |