Vulnerability Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can consume excessive memory while parsing a crafted PDF page tree containing many shared resources. Page-tree flattening copies page dictionary and inherited resource entries without a document-wide entry budget, allowing the crafted resource structure to cause disproportionate allocations. This issue is fixed in version 6.21.4.
Related Weaknesses (CWE)
References
- https://github.com/py-pdf/pypdf/commit/ea4ac663133f1b3de1d7a8f2e6fa239802fde79e
- https://github.com/py-pdf/pypdf/pull/4290
- https://github.com/py-pdf/pypdf/releases/tag/6.21.4
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-cggf-277g-3q54
FAQ
What is CVE-2026-119204?
CVE-2026-119204 is a documented vulnerability. pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can consume excessive memory while parsing a crafted PDF page tree containing many shared resources. Page-tree flattenin...
How severe is CVE-2026-119204?
CVSS scoring is not yet available for CVE-2026-119204. Check NVD for updates.
Is there a patch for CVE-2026-119204?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.