# CVE-2026-113786: pypdf: pypdf is a free and open-source pure-python PDF library

CVE-2026-113786 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-113786, released October 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-113786
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0041
- 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 6.21.1, 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | pypdf Debian 14 | 6.21.1-1 | [DEBIAN-CVE-2026-113786](https://patchblox.com/security/data/fix/linux/debian-cve-2026-113786.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 |

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Data as of 2026-11-09T13:31:49Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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