CVE-2026-16360: Vulnerability in Mozilla Firefox
Memory safety bugs present in Thunderbird ESR 140.12 and Thunderbird 152. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
AI Analysis
Technical Summary
CVE-2026-16360 covers a set of memory safety vulnerabilities affecting Firefox ESR 115.37, Firefox ESR 140.12, and Firefox 152. These bugs involve memory corruption issues that could be leveraged to run arbitrary code with sufficient effort. Mozilla addressed these issues by releasing patches in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. The vendor advisory classifies the impact as high and confirms the fixes are available in these versions. There is no CVSS score provided, but the advisory indicates a high severity level. No active exploitation has been observed.
Potential Impact
The vulnerabilities could allow attackers to exploit memory corruption bugs to execute arbitrary code within the context of the affected Firefox browsers. This could lead to compromise of user systems running the vulnerable versions. The impact is rated high by the vendor due to the potential for code execution. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Mozilla has released official fixes for these vulnerabilities in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. Users and administrators should update affected Firefox installations to these versions or later to remediate the vulnerabilities. Patch status is confirmed by the vendor advisory. No additional mitigation steps are required beyond applying these updates.
CVE-2026-16360: Vulnerability in Mozilla Firefox
Description
Memory safety bugs present in Thunderbird ESR 140.12 and Thunderbird 152. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
CVSS v3.1
Score 9.8critical
Affected software
pkg:github/mozilla/gecko-devRun 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-2026-16360 covers a set of memory safety vulnerabilities affecting Firefox ESR 115.37, Firefox ESR 140.12, and Firefox 152. These bugs involve memory corruption issues that could be leveraged to run arbitrary code with sufficient effort. Mozilla addressed these issues by releasing patches in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. The vendor advisory classifies the impact as high and confirms the fixes are available in these versions. There is no CVSS score provided, but the advisory indicates a high severity level. No active exploitation has been observed.
Potential Impact
The vulnerabilities could allow attackers to exploit memory corruption bugs to execute arbitrary code within the context of the affected Firefox browsers. This could lead to compromise of user systems running the vulnerable versions. The impact is rated high by the vendor due to the potential for code execution. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Mozilla has released official fixes for these vulnerabilities in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. Users and administrators should update affected Firefox installations to these versions or later to remediate the vulnerabilities. Patch status is confirmed by the vendor advisory. No additional mitigation steps are required beyond applying these updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-496m-5cg2-hw82
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-16360"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5fd1591010f89cc21c9d52
Added to database: 07/21/2026, 20:06:49 UTC
Last enriched: 07/22/2026, 17:29:48 UTC
Last updated: 09/02/2026, 10:52:07 UTC
Views: 70
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