CVE-2026-12290: Vulnerability in Mozilla Firefox
CVE-2026-12290 is a memory safety vulnerability in Mozilla Firefox that was fixed in Firefox 152 and Firefox ESR 140.12. The issue involves memory safety bugs that could lead to memory corruption. Mozilla has addressed this vulnerability along with multiple other related memory safety issues in the same releases. These fixes mitigate the risk of potential exploitation to run arbitrary code.
AI Analysis
Technical Summary
CVE-2026-12290 is a memory safety bug in Mozilla Firefox reported by jayjayjazz and fixed in Firefox 152 and Firefox ESR 140.12. The vulnerability was part of a set of memory safety bugs that showed evidence of memory corruption, which could potentially be exploited to execute arbitrary code. Mozilla released official security advisories (MFSA 2026-57 and MFSA 2026-58) detailing the fixes in Firefox 152 and Firefox ESR 140.12. The advisories confirm that these bugs were present in Firefox 151, Firefox ESR 140.11, and earlier versions, and were mitigated in the stated fixed versions. No known exploits in the wild have been reported. The vendor advisories provide detailed references to bug reports and confirm the high impact of this vulnerability.
Potential Impact
The vulnerability involves memory safety bugs that could lead to memory corruption, which in turn could allow an attacker to execute arbitrary code within the context of the affected Firefox browser. This represents a high impact on confidentiality, integrity, and availability of the affected system. There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 152 and Firefox ESR 140.12. Users and administrators should update affected Firefox installations to these versions or later to remediate the issue. Since this is not a cloud service, remediation depends on applying these updates. Patch status is confirmed by the vendor advisories. No additional mitigation actions are indicated beyond applying the official updates.
CVE-2026-12290: Vulnerability in Mozilla Firefox
Description
CVE-2026-12290 is a memory safety vulnerability in Mozilla Firefox that was fixed in Firefox 152 and Firefox ESR 140.12. The issue involves memory safety bugs that could lead to memory corruption. Mozilla has addressed this vulnerability along with multiple other related memory safety issues in the same releases. These fixes mitigate the risk of potential exploitation to run arbitrary code.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12290 is a memory safety bug in Mozilla Firefox reported by jayjayjazz and fixed in Firefox 152 and Firefox ESR 140.12. The vulnerability was part of a set of memory safety bugs that showed evidence of memory corruption, which could potentially be exploited to execute arbitrary code. Mozilla released official security advisories (MFSA 2026-57 and MFSA 2026-58) detailing the fixes in Firefox 152 and Firefox ESR 140.12. The advisories confirm that these bugs were present in Firefox 151, Firefox ESR 140.11, and earlier versions, and were mitigated in the stated fixed versions. No known exploits in the wild have been reported. The vendor advisories provide detailed references to bug reports and confirm the high impact of this vulnerability.
Potential Impact
The vulnerability involves memory safety bugs that could lead to memory corruption, which in turn could allow an attacker to execute arbitrary code within the context of the affected Firefox browser. This represents a high impact on confidentiality, integrity, and availability of the affected system. There are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 152 and Firefox ESR 140.12. Users and administrators should update affected Firefox installations to these versions or later to remediate the issue. Since this is not a cloud service, remediation depends on applying these updates. Patch status is confirmed by the vendor advisories. No additional mitigation actions are indicated beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-06-15T15:08:06.073Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-57/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-58/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-59/","vendor":"Mozilla"}]
Threat ID: 6a314c7b0b89be6888b4cbb3
Added to database: 6/16/2026, 1:15:39 PM
Last enriched: 6/16/2026, 1:47:18 PM
Last updated: 6/17/2026, 5:10:35 AM
Views: 6
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