CVE-2026-74982: Vulnerability in Mozilla Firefox
Denial-of-service in the Widget component. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1.
AI Analysis
Technical Summary
CVE-2026-74982 is a denial-of-service vulnerability affecting the Widget component in Mozilla Firefox. The flaw allows an attacker to cause a denial-of-service condition, potentially impacting browser stability. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1 as part of a broader security update addressing multiple high, moderate, and low impact vulnerabilities. The vendor advisory confirms the fix and recommends updating to these versions.
Potential Impact
The vulnerability can cause denial-of-service in the Firefox browser, potentially disrupting user sessions or browser functionality. The impact is rated low compared to other simultaneous vulnerabilities fixed in the same release cycle. There are no known exploits in the wild targeting this vulnerability.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 154 and Firefox ESR 153.1. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official update.
CVE-2026-74982: Vulnerability in Mozilla Firefox
Description
Denial-of-service in the Widget component. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1.
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-74982 is a denial-of-service vulnerability affecting the Widget component in Mozilla Firefox. The flaw allows an attacker to cause a denial-of-service condition, potentially impacting browser stability. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1 as part of a broader security update addressing multiple high, moderate, and low impact vulnerabilities. The vendor advisory confirms the fix and recommends updating to these versions.
Potential Impact
The vulnerability can cause denial-of-service in the Firefox browser, potentially disrupting user sessions or browser functionality. The impact is rated low compared to other simultaneous vulnerabilities fixed in the same release cycle. There are no known exploits in the wild targeting this vulnerability.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 154 and Firefox ESR 153.1. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-08-17T11:59:10.459Z
- 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: 6a84550bc6e8be03323676be
Added to database: 08/18/2026, 12:50:19 UTC
Last enriched: 08/18/2026, 13:25:01 UTC
Last updated: 08/18/2026, 16:43:24 UTC
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.