CVE-2026-100814: Vulnerability in Mozilla Firefox
Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
AI Analysis
Technical Summary
This vulnerability involves incorrect boundary conditions within the Just-In-Time (JIT) component of the JavaScript Engine in Mozilla Firefox. Such a defect could potentially lead to security issues, though specific exploitation details are not provided. Mozilla fixed this issue in Firefox ESR 153.4 and Firefox 157 releases, indicating that versions prior to these are affected.
Potential Impact
The vulnerability is classified as high impact by Mozilla, implying it could lead to serious security consequences if exploited. However, there are no known exploits in the wild currently. The exact nature of the impact is not detailed beyond the high severity rating.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox ESR 153.4 and Firefox 157. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation actions are indicated by the vendor advisory.
CVE-2026-100814: Vulnerability in Mozilla Firefox
Description
Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
CVSS v3.1
Score 8.8high
Affected software
Mozilla
Firefox
Run 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
This vulnerability involves incorrect boundary conditions within the Just-In-Time (JIT) component of the JavaScript Engine in Mozilla Firefox. Such a defect could potentially lead to security issues, though specific exploitation details are not provided. Mozilla fixed this issue in Firefox ESR 153.4 and Firefox 157 releases, indicating that versions prior to these are affected.
Potential Impact
The vulnerability is classified as high impact by Mozilla, implying it could lead to serious security consequences if exploited. However, there are no known exploits in the wild currently. The exact nature of the impact is not detailed beyond the high severity rating.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox ESR 153.4 and Firefox 157. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation actions are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-26T19:18:18.950Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-100/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/","vendor":"Mozilla"}]
Threat ID: 6abbb3f5f7a7c541066409b6
Added to database: 09/29/2026, 12:49:57 UTC
Last enriched: 09/29/2026, 13:03:45 UTC
Last updated: 09/29/2026, 18:20:12 UTC
Views: 6
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.