Resource Exhaustion Affecting pypdf package, versions <6.21.0-1
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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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-PYPDF-21435191
- published23 Oct 2026
- disclosed21 Oct 2026
Introduced: 21 Oct 2026
NewCVE-2026-113789 (opens in a new tab)How to fix?
Upgrade Debian:unstable pypdf to version 6.21.0-1 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:unstable relevant fixed versions and status.
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.0, an attacker can craft a PDF that causes large memory usage or long runtimes when an application retrieves the document's form fields. This issue is fixed in version 6.21.0.
References
- https://security-tracker.debian.org/tracker/CVE-2026-113789
- https://github.com/py-pdf/pypdf/commit/5ef728f0e16d225c853e89f861ba0a67402fe3f2
- https://github.com/py-pdf/pypdf/pull/4219
- https://github.com/py-pdf/pypdf/releases/tag/6.21.0
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-6vvc-x485-93v7