Improper Input Validation Affecting pypdf package, versions <6.21.1-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published23 Oct 2026
- disclosed21 Oct 2026
Introduced: 21 Oct 2026
NewCVE-2026-113786 (opens in a new tab)How to fix?
Upgrade Debian:14 pypdf to version 6.21.1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream pypdf package and not the pypdf package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-113786
- 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