# DSA-5979-1: libxslt security update

DSA-5979-1, released August 19, 2025, fixes 1 CVE in libxslt. None of them is reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/fix/linux/dsa-5979-1
- Platform: Linux
- Released: Aug 19, 2025
- Priority: Routine (Closes CVE-2023-40403)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2023-40403

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libxslt](https://patchblox.com/security/data/product/linux/libxslt.md) | Debian 12.15 (bookworm) | 1.1.35-1+deb12u2 |
| [libxslt](https://patchblox.com/security/data/product/linux/libxslt.md) | Debian 13.5 (trixie) | 1.1.35-1.2+deb13u1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-40403](https://patchblox.com/security/data/cve/CVE-2023-40403.md) | Routine | libxslt: This update for libxslt fixes the following issues:  - CVE-2023-40403: Fixed sensitive information disclosure during... | 6.5 | 0.0133 |  |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo