Loop with Unreachable Exit Condition ('Infinite Loop') Affecting pypdf package, versions *
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-DEBIAN12-PYPDF-21435144
- published23 Oct 2026
- disclosed21 Oct 2026
Introduced: 21 Oct 2026
NewCVE-2026-113793 (opens in a new tab)How to fix?
There is no fixed version for Debian:12 pypdf.
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:12 relevant fixed versions and status.
pypdf is a free and open-source pure-python PDF library. Prior to 6.20.1, removing an object from a crafted cyclic PDF tree, such as an outline item, can enter an infinite loop and block the current process. This issue is fixed in version 6.20.1.
References
- https://security-tracker.debian.org/tracker/CVE-2026-113793
- https://github.com/py-pdf/pypdf/commit/c9c35b4471c2eb5fe078094f6c816e69d4ed25a0
- https://github.com/py-pdf/pypdf/pull/4188
- https://github.com/py-pdf/pypdf/releases/tag/6.20.1
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-9mx8-4j7g-633p