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CVE-2026-74979 Details
Description
Mitigation bypass in the Add-ons Manager component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
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 Aug 18, 2026Exploitation: NoneAutomatable: YesTechnical Impact: Total
References 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=2045676 | [email protected] | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2026-74/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-77/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-78/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-80/ | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-284 | Improper Access Control | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| mozilla firefox | < 153.1.0 < 154.0.0 |
CPE
Remediation
| |
| mozilla thunderbird | < 153.1.0 < 154.0 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 20, 2026 | Initial Analysis | [email protected] |
| Aug 18, 2026 | CVE Modified | [email protected] |
| Aug 18, 2026 | CVE Modified | CISA-ADP |
| Aug 18, 2026 | New CVE Received | [email protected] |