CVE-2026-8974: Vulnerability in Mozilla Firefox
CVE-2026-8974 is a set of memory safety bugs affecting Mozilla Firefox ESR 140. 10 and Firefox 150. These bugs showed evidence of memory corruption and could potentially be exploited to execute arbitrary code. The vulnerabilities were fixed in Firefox 151 and Firefox ESR 140. 11. There are no known exploits in the wild. The vendor has released official security advisories confirming the fixes.
AI Analysis
Technical Summary
This vulnerability involves multiple memory safety issues in Firefox ESR 140.10 and Firefox 150, some of which demonstrated memory corruption that might have allowed arbitrary code execution with sufficient effort. Mozilla addressed these issues by releasing patches in Firefox 151 and Firefox ESR 140.11. The vendor advisories (MFSA2026-46 and MFSA2026-48) provide detailed information on these and related vulnerabilities fixed in these versions.
Potential Impact
The impact of these memory safety bugs is moderate to high due to the potential for arbitrary code execution if exploited. However, there are no reports of active exploitation in the wild. Successful exploitation could allow attackers to execute code within the context of the affected Firefox versions.
Mitigation Recommendations
Official fixes are available in Firefox 151 and Firefox ESR 140.11. Users and administrators should update to these or later versions to remediate the vulnerabilities. Since the vendor advisories confirm the availability of patches, applying these updates is the recommended mitigation.
CVE-2026-8974: Vulnerability in Mozilla Firefox
Description
CVE-2026-8974 is a set of memory safety bugs affecting Mozilla Firefox ESR 140. 10 and Firefox 150. These bugs showed evidence of memory corruption and could potentially be exploited to execute arbitrary code. The vulnerabilities were fixed in Firefox 151 and Firefox ESR 140. 11. There are no known exploits in the wild. The vendor has released official security advisories confirming the fixes.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves multiple memory safety issues in Firefox ESR 140.10 and Firefox 150, some of which demonstrated memory corruption that might have allowed arbitrary code execution with sufficient effort. Mozilla addressed these issues by releasing patches in Firefox 151 and Firefox ESR 140.11. The vendor advisories (MFSA2026-46 and MFSA2026-48) provide detailed information on these and related vulnerabilities fixed in these versions.
Potential Impact
The impact of these memory safety bugs is moderate to high due to the potential for arbitrary code execution if exploited. However, there are no reports of active exploitation in the wild. Successful exploitation could allow attackers to execute code within the context of the affected Firefox versions.
Mitigation Recommendations
Official fixes are available in Firefox 151 and Firefox ESR 140.11. Users and administrators should update to these or later versions to remediate the vulnerabilities. Since the vendor advisories confirm the availability of patches, applying these updates is the recommended mitigation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-05-19T12:30:22.393Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-46/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-48/","vendor":"Mozilla"}]
Threat ID: 6a0c6782ec166c07b0a99bc6
Added to database: 5/19/2026, 1:37:06 PM
Last enriched: 5/19/2026, 1:52:44 PM
Last updated: 5/19/2026, 2:41:31 PM
Views: 3
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.