# CVE-2026-119203: pypdf: pypdf is a free and open-source pure-python PDF library

CVE-2026-119203 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-119203, released November 6, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-119203
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 29, 2026

## Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop while opening a crafted incomplete PDF whose standard cross-reference table reaches the end of the file without a trailer. The trailer search can repeatedly rewind to the same stream position instead of terminating when parsing makes no progress, blocking the processing thread. This issue is fixed in version 6.21.4.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | pypdf Debian 14 | 6.21.4-1 | [DEBIAN-CVE-2026-119203](https://patchblox.com/security/data/fix/linux/debian-cve-2026-119203.md) | Nov 6, 2026 |
| Linux | python-pypdf opensuse-leap 16.0 | 6.19.0-bp160.3.1 | [OPENSUSE-SU-2026:22219-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22219-1.md) | Nov 7, 2026 |

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Data as of 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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