CVE-2026-8963 Details
Description
Spoofing issue in the Web Speech component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
A spoofing vulnerability has been identified in the Web Speech component of Mozilla Firefox. This issue was present in Firefox versions prior to 151 and has been reported to Bugzilla. The vulnerability allows for deceptive manipulation, although the specific details of the spoofing impact are not disclosed.
Users can upgrade to Firefox 151 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 19, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=2021222 | [email protected] | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2026-46/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-50/ | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-290 | Authentication Bypass by Spoofing | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| mozilla firefox | < 151.0.0 |
CPE
Remediation
| |
| mozilla thunderbird | < 151.0.0 |
CPE
Remediation
| |
Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 20, 2026 | Initial Analysis | [email protected] |
| May 19, 2026 | CVE Modified | [email protected] |
| May 19, 2026 | CVE Modified | CISA-ADP |
| May 19, 2026 | New CVE Received | [email protected] |