Vulnerability Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.1, an attacker can craft a PDF containing image data labeled with the /DCTDecode filter that causes Pillow to select and invoke an unintended image parser when the image is loaded. Environments without the optional Pillow dependency are not affected. This issue is fixed in version 6.21.1.
Related Weaknesses (CWE)
References
- https://github.com/py-pdf/pypdf/commit/512d8eb94eb04be1d1c90504e6da2dcef8679e07
- https://github.com/py-pdf/pypdf/pull/4222
- https://github.com/py-pdf/pypdf/releases/tag/6.21.1
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-5hx5-vpf9-5wcv
FAQ
What is CVE-2026-113786?
CVE-2026-113786 is a documented vulnerability. pypdf is a free and open-source pure-python PDF library. Prior to 6.21.1, an attacker can craft a PDF containing image data labeled with the /DCTDecode filter that causes Pillow to select and invoke a...
How severe is CVE-2026-113786?
CVSS scoring is not yet available for CVE-2026-113786. Check NVD for updates.
Is there a patch for CVE-2026-113786?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.