CVE-2026-74961: Vulnerability in Mozilla Firefox
Side-channel in the Web Audio component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
AI Analysis
Technical Summary
CVE-2026-74961 is a side-channel vulnerability affecting the Web Audio component in Mozilla Firefox. It enables unauthorized disclosure of sensitive information, impacting confidentiality and integrity. The issue was resolved in Firefox 154 and Firefox ESR 153.1. The CVSS 3.1 base score is 9.1, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality and integrity. The vendor advisory confirms the fix and recommends upgrading to the patched versions.
Potential Impact
The vulnerability allows an attacker to gain unauthorized access to sensitive information via a side-channel in the Web Audio component, potentially compromising confidentiality and integrity of user data. The CVSS score of 9.1 classifies this as a critical issue. There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
A fix is available and has been officially released by Mozilla. Users should update to Firefox 154 or later, or Firefox ESR 153.1 or later, to remediate this vulnerability. No additional mitigation steps are required beyond applying the official update.
CVE-2026-74961: Vulnerability in Mozilla Firefox
Description
Side-channel in the Web Audio component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
CVSS v3.1
Score 9.1critical
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
pkg:github/mozilla/firefox-esrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-74961 is a side-channel vulnerability affecting the Web Audio component in Mozilla Firefox. It enables unauthorized disclosure of sensitive information, impacting confidentiality and integrity. The issue was resolved in Firefox 154 and Firefox ESR 153.1. The CVSS 3.1 base score is 9.1, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality and integrity. The vendor advisory confirms the fix and recommends upgrading to the patched versions.
Potential Impact
The vulnerability allows an attacker to gain unauthorized access to sensitive information via a side-channel in the Web Audio component, potentially compromising confidentiality and integrity of user data. The CVSS score of 9.1 classifies this as a critical issue. There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
A fix is available and has been officially released by Mozilla. Users should update to Firefox 154 or later, or Firefox ESR 153.1 or later, to remediate this vulnerability. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-08-17T11:58:24.273Z
- State
- PUBLISHED
- 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: 6a845507c6e8be03323673f1
Added to database: 08/18/2026, 12:50:15 UTC
Last enriched: 09/18/2026, 23:33:50 UTC
Last updated: 10/03/2026, 06:06:05 UTC
Views: 42
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