# RHSA-2025:10196: thunderbird security update

RHSA-2025:10196, released July 2, 2025, fixes 5 CVEs in thunderbird (version 0:128.12.0-1.el9_6). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2025-10196
- Platform: Linux
- Released: Jul 2, 2025
- Priority: High (Closes CVE-2025-6424, high severity)
- CVEs: 5, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2025:10196

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [thunderbird](https://patchblox.com/security/data/product/linux/thunderbird.md) | RHEL 9 | 0:128.12.0-1.el9_6 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-6424](https://patchblox.com/security/data/cve/CVE-2025-6424.md) | High | Use-after-free in FontFaceSet | 9.8 | 0.0796 |  |
| [CVE-2025-5986](https://patchblox.com/security/data/cve/CVE-2025-5986.md) | High | Unsolicited File Download, Disk Space Exhaustion, and Credential Leakage via mailbox:/// Links | 7.5 | 0.0058 |  |
| [CVE-2025-6429](https://patchblox.com/security/data/cve/CVE-2025-6429.md) | High | Incorrect parsing of URLs could have allowed embedding of youtube.com | 7.5 | 0.0036 |  |
| [CVE-2025-6425](https://patchblox.com/security/data/cve/CVE-2025-6425.md) | High | The WebCompat WebExtension shipped with Firefox exposed a persistent UUID | 7.5 | 0.0031 |  |
| [CVE-2025-6430](https://patchblox.com/security/data/cve/CVE-2025-6430.md) | High | Content-Disposition header ignored when a file is included in an embed or object tag | 7.5 | 0.0027 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo