# DSA-5839-1: firefox-esr security update

DSA-5839-1, released January 8, 2025, fixes 1 CVE in firefox-esr (version 128.6.0esr-1~deb12u1). None of them is reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/fix/linux/dsa-5839-1
- Platform: Linux
- Released: Jan 8, 2025
- Priority: Routine (Closes CVE-2025-0237)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2025-0237

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [firefox-esr](https://patchblox.com/security/data/product/linux/firefox-esr.md) | Debian 12.15 (bookworm) | 128.6.0esr-1~deb12u1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-0237](https://patchblox.com/security/data/cve/CVE-2025-0237.md) | Routine | WebChannel APIs susceptible to confused deputy attack | 6.8 | 0.0060 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo