CVE-2026-74965: Vulnerability in Mozilla Firefox
Privilege escalation in the Shell Integration 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.
AI Analysis
Technical Summary
CVE-2026-74965 is a privilege escalation vulnerability affecting the Shell Integration component in Mozilla Firefox. The flaw was identified internally and fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1. This vulnerability is part of a broader set of security issues addressed in these releases, many of which have high impact ratings. The Mozilla Foundation has published security advisories confirming the fixes and urging users to update to the patched versions.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox process context, potentially leading to unauthorized actions or access. The impact is rated moderate by Mozilla for this specific vulnerability, indicating a significant but not critical risk. There are no known exploits in the wild at the time of the advisory.
Mitigation Recommendations
Mozilla has released official patches fixing this vulnerability in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1. Users and administrators should update affected Firefox installations to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official updates.
CVE-2026-74965: Vulnerability in Mozilla Firefox
Description
Privilege escalation in the Shell Integration 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.
CVSS v3.1
Score 8.8high
Affected software
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-2026-74965 is a privilege escalation vulnerability affecting the Shell Integration component in Mozilla Firefox. The flaw was identified internally and fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1. This vulnerability is part of a broader set of security issues addressed in these releases, many of which have high impact ratings. The Mozilla Foundation has published security advisories confirming the fixes and urging users to update to the patched versions.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox process context, potentially leading to unauthorized actions or access. The impact is rated moderate by Mozilla for this specific vulnerability, indicating a significant but not critical risk. There are no known exploits in the wild at the time of the advisory.
Mitigation Recommendations
Mozilla has released official patches fixing this vulnerability in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1. Users and administrators should update affected Firefox installations to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-08-17T11:58:33.288Z
- 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/mfsa2026-76/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-77/","vendor":"Mozilla"}]
Threat ID: 6a845509c6e8be033236743d
Added to database: 08/18/2026, 12:50:17 UTC
Last enriched: 08/18/2026, 13:40:23 UTC
Last updated: 08/18/2026, 19:05:04 UTC
Views: 4
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