Mitigation bypass in the Storage: Cache API component
Summary
| CVE | CVE-2026-74959 |
|---|---|
| State | PUBLISHED |
| Assigner | mozilla |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-18 13:17:33 UTC |
| Updated | 2026-08-18 19:17:11 UTC |
| Description | Mitigation bypass in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1. |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Mozilla | Firefox | unaffected 140.14 140.* rpm | Not specified |
| CNA | Mozilla | Firefox | unaffected 153.1 153.* rpm | Not specified |
| CNA | Mozilla | Firefox | unaffected 154 * rpm | Not specified |
| CNA | Mozilla | Thunderbird | unaffected 140.14 140.* rpm | Not specified |
| CNA | Mozilla | Thunderbird | unaffected 153.1 153.* rpm | Not specified |
| CNA | Mozilla | Thunderbird | unaffected 154 * rpm | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| bugzilla.mozilla.org/show_bug.cgi | [email protected] | bugzilla.mozilla.org | |
| www.mozilla.org/security/advisories/mfsa2026-78 | [email protected] | www.mozilla.org | |
| www.mozilla.org/security/advisories/mfsa2026-79 | [email protected] | www.mozilla.org | |
| www.mozilla.org/security/advisories/mfsa2026-77 | [email protected] | www.mozilla.org | |
| www.mozilla.org/security/advisories/mfsa2026-76 | [email protected] | www.mozilla.org | |
| www.mozilla.org/security/advisories/mfsa2026-74 | [email protected] | www.mozilla.org | |
| www.mozilla.org/security/advisories/mfsa2026-80 | [email protected] | www.mozilla.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: David Bors at Snyk Security Labs (en)
There are currently no legacy QID mappings associated with this CVE.