Vulnerability Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can take excessive time to retrieve page labels from a crafted PDF containing a flat page-label number tree with many ranges. The page_labels property resolves each page independently and repeatedly scans the same /Nums array from the beginning, causing work to grow with both the page count and the number of label ranges. This issue is fixed in version 6.21.3.
Related Weaknesses (CWE)
References
- https://github.com/py-pdf/pypdf/commit/b891fef37000cd86baa6e9848a3387d080b3b03e
- https://github.com/py-pdf/pypdf/pull/4251
- https://github.com/py-pdf/pypdf/releases/tag/6.21.3
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-42gh-23hr-vphw
FAQ
What is CVE-2026-119206?
CVE-2026-119206 is a documented vulnerability. pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can take excessive time to retrieve page labels from a crafted PDF containing a flat page-label number tree with many ra...
How severe is CVE-2026-119206?
CVSS scoring is not yet available for CVE-2026-119206. Check NVD for updates.
Is there a patch for CVE-2026-119206?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.