# DSA-6152-1: thunderbird security update

DSA-6152-1, released February 28, 2026, fixes 1 CVE in thunderbird. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/dsa-6152-1
- Platform: Linux
- Released: Feb 28, 2026
- Priority: High (Closes CVE-2026-2757, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2026-2757

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [thunderbird](https://patchblox.com/security/data/product/linux/thunderbird.md) | Debian 12.15 (bookworm) | 1:140.8.0esr-1~deb12u1 |
| [thunderbird](https://patchblox.com/security/data/product/linux/thunderbird.md) | Debian 13.5 (trixie) | 1:140.8.0esr-1~deb13u1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-2757](https://patchblox.com/security/data/cve/CVE-2026-2757.md) | High | Incorrect boundary conditions in the WebRTC: Audio/Video component | 9.8 | 0.0059 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo