# DEBIAN-CVE-2026-42563: dulwich security update

DEBIAN-CVE-2026-42563, released June 29, 2026, fixes 1 CVE in dulwich (version 1.2.5-1). None of them is reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/fix/linux/debian-cve-2026-42563
- Platform: Linux
- Released: Jun 29, 2026
- Priority: Routine (Closes CVE-2026-42563)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2026-42563

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [dulwich](https://patchblox.com/security/data/product/linux/dulwich.md) | Debian 14 | 1.2.5-1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-42563](https://patchblox.com/security/data/cve/CVE-2026-42563.md) | Routine | dulwich: Dulwich is a pure-Python implementation of the Git file formats and protocols | n/a | 0.0056 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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