CVEvulnerability
CVE-2026-57963
6.5 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-01
- Last modified
- 2026-10-25
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Weaknesses
- CWE-79
Description
An attacker who can send HTML chat messages (via Matrix or XMPP) can inject arbitrary styled content, phishing links, and CSS that manipulates the chat UI. This vulnerability was fixed in Thunderbird 152.0.1 and Thunderbird 140.12.1.
Affected configurations
• mozilla thunderbird (< 140.12.1)
• mozilla thunderbird (< 152.0.1)
Related
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2042910 Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-63/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-64/ Vendor Advisory