CVE-2026-15719: Vulnerability in Mozilla Firefox
We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6.
AI Analysis
Technical Summary
CVE-2026-15719 is a security vulnerability affecting Mozilla Firefox's site isolation in the DOM navigation component. Although exploit code has been made public, no active exploitation has been observed. Mozilla addressed this vulnerability by releasing a fix in Firefox 152.0.6. The advisory classifies the impact as critical but does not provide a CVSS score. The vulnerability was reported by Atsushi Sada and tracked under Bug 2043820.
Potential Impact
The vulnerability has a critical impact rating according to Mozilla, indicating it could allow significant security breaches if exploited. However, there are no confirmed attacks in the wild at this time. The presence of public exploit code increases the risk of potential exploitation if users do not update.
Mitigation Recommendations
Users and administrators should update Mozilla Firefox to version 152.0.6 or later to remediate this vulnerability. Since the vendor has released an official fix, applying this update fully mitigates the risk. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-15719: Vulnerability in Mozilla Firefox
Description
We are aware that exploit code for this is public however we are not aware of any attacks in the wild abusing this flaw. This vulnerability was fixed in Firefox 152.0.6.
CVSS v3.1
Score 5.4medium
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-2026-15719 is a security vulnerability affecting Mozilla Firefox's site isolation in the DOM navigation component. Although exploit code has been made public, no active exploitation has been observed. Mozilla addressed this vulnerability by releasing a fix in Firefox 152.0.6. The advisory classifies the impact as critical but does not provide a CVSS score. The vulnerability was reported by Atsushi Sada and tracked under Bug 2043820.
Potential Impact
The vulnerability has a critical impact rating according to Mozilla, indicating it could allow significant security breaches if exploited. However, there are no confirmed attacks in the wild at this time. The presence of public exploit code increases the risk of potential exploitation if users do not update.
Mitigation Recommendations
Users and administrators should update Mozilla Firefox to version 152.0.6 or later to remediate this vulnerability. Since the vendor has released an official fix, applying this update fully mitigates the risk. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-14T12:15:46.894Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-67/","vendor":"Mozilla"}]
Threat ID: 6a56300c68715ace4381b655
Added to database: 07/14/2026, 12:48:12 UTC
Last enriched: 07/14/2026, 13:03:27 UTC
Last updated: 07/14/2026, 13:51:28 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.