CVE-2026-7323: Vulnerability in Mozilla Firefox
Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. 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 150.0.1, Firefox ESR 140.10.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.
AI Analysis
Technical Summary
This vulnerability involves memory safety bugs in Mozilla Firefox ESR 140.10.0 and Firefox 150.0.0 that showed evidence of memory corruption. With sufficient effort, these bugs could have been exploited to run arbitrary code. Mozilla addressed these issues by releasing fixed versions Firefox ESR 140.10.1 and Firefox 150.0.1. The CVSS score is 7.3 (high), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and impacts on confidentiality, integrity, and availability. The vendor advisories confirm the fixes and provide detailed references to the bugs and reporters.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code remotely without user interaction or privileges, potentially compromising confidentiality, integrity, and availability of the affected system. However, there are no known exploits in the wild currently.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox ESR 140.10.1 and Firefox 150.0.1. Users and administrators should update affected Firefox versions to these fixed releases to remediate the issue. Patch status is confirmed by Mozilla advisories. No additional mitigation is required once updated.
CVE-2026-7323: Vulnerability in Mozilla Firefox
Description
Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. 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 150.0.1, Firefox ESR 140.10.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.
CVSS v3.1
Score 7.3high
Affected software
pkg:github/mozilla/thunderbirdRun 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
This vulnerability involves memory safety bugs in Mozilla Firefox ESR 140.10.0 and Firefox 150.0.0 that showed evidence of memory corruption. With sufficient effort, these bugs could have been exploited to run arbitrary code. Mozilla addressed these issues by releasing fixed versions Firefox ESR 140.10.1 and Firefox 150.0.1. The CVSS score is 7.3 (high), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and impacts on confidentiality, integrity, and availability. The vendor advisories confirm the fixes and provide detailed references to the bugs and reporters.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code remotely without user interaction or privileges, potentially compromising confidentiality, integrity, and availability of the affected system. However, there are no known exploits in the wild currently.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox ESR 140.10.1 and Firefox 150.0.1. Users and administrators should update affected Firefox versions to these fixed releases to remediate the issue. Patch status is confirmed by Mozilla advisories. No additional mitigation is required once updated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-04-28T13:42:18.353Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-35/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-36/","vendor":"Mozilla"}]
Threat ID: 69f0c288cbff5d86101cc9f9
Added to database: 04/28/2026, 14:22:00 UTC
Last enriched: 07/15/2026, 09:40:03 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 151
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