# CVE-2026-113793: pypdf: pypdf is a free and open-source pure-python PDF library

CVE-2026-113793 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-113793, released October 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-113793
- Priority: Routine
- CVSS: 4.3 (medium)
- EPSS: 0.0035
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 21, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | pypdf Debian 14 | 6.21.0-1 | [DEBIAN-CVE-2026-113793](https://patchblox.com/security/data/fix/linux/debian-cve-2026-113793.md) | Oct 24, 2026 |
| Linux | python-pypdf opensuse-leap 16.0 | 6.19.0-bp160.2.1 | [OPENSUSE-SU-2026:22188-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22188-1.md) | Nov 7, 2026 |

---

Data as of 2026-11-10T01:44:33Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.