CVE-2026-74954: Vulnerability in Mozilla Firefox
Information disclosure due to side-channel in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-74954 involves information disclosure through a side-channel in the Storage: Cache API component of Mozilla Firefox. This flaw could potentially allow unauthorized information exposure. Mozilla addressed this issue in Firefox 154 and Firefox ESR 153.1 as part of a broader security update that fixed multiple high and moderate impact vulnerabilities. The vendor advisory confirms the fix and recommends updating to these versions.
Potential Impact
The vulnerability allows information disclosure due to a side-channel in the Storage: Cache API component. The impact is rated moderate by Mozilla. There are no known exploits in the wild. Successful exploitation could lead to unauthorized access to sensitive information through side-channel analysis.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 154 and Firefox ESR 153.1. Users should update to these versions to remediate the issue. No additional mitigation actions are required beyond applying the official update.
CVE-2026-74954: Vulnerability in Mozilla Firefox
Description
Information disclosure due to side-channel in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-74954 involves information disclosure through a side-channel in the Storage: Cache API component of Mozilla Firefox. This flaw could potentially allow unauthorized information exposure. Mozilla addressed this issue in Firefox 154 and Firefox ESR 153.1 as part of a broader security update that fixed multiple high and moderate impact vulnerabilities. The vendor advisory confirms the fix and recommends updating to these versions.
Potential Impact
The vulnerability allows information disclosure due to a side-channel in the Storage: Cache API component. The impact is rated moderate by Mozilla. There are no known exploits in the wild. Successful exploitation could lead to unauthorized access to sensitive information through side-channel analysis.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 154 and Firefox ESR 153.1. Users should update to these versions to remediate the issue. No additional mitigation actions are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-08-17T11:58:08.011Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-74/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-77/","vendor":"Mozilla"}]
Threat ID: 6a845507c6e8be03323673e3
Added to database: 08/18/2026, 12:50:15 UTC
Last enriched: 08/18/2026, 13:42:12 UTC
Last updated: 08/18/2026, 22:32:25 UTC
Views: 3
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