Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Mozilla
  • Firefox

Configuration 1 [-]

cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*

No data.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2036978 cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-8388 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-8388 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-45/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-45/#CVE-2026-8388 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-47/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-48/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8388 cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-51/ cve-icon cve-icon
History

Wed, 20 May 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-787
References
Metrics threat_severity

None

 threat_severity

Important

Tue, 19 May 2026 17:45:00 +0000

Type Values Removed Values Added
Description Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, and Firefox ESR 140.11. Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.
References

Tue, 19 May 2026 15:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-787

Tue, 19 May 2026 13:45:00 +0000

Type Values Removed Values Added
Description Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3. Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, and Firefox ESR 140.11.
References

Tue, 12 May 2026 20:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*

Tue, 12 May 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 12 May 2026 15:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119
CWE-787

Tue, 12 May 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox

Tue, 12 May 2026 13:30:00 +0000

Type Values Removed Values Added
Description Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.
Title Incorrect boundary conditions in the JavaScript Engine: JIT component
References
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-05-12T12:36:10.633Z

Updated: 2026-05-19T17:10:46.244Z

Reserved: 2026-05-12T12:36:09.855Z

Link: CVE-2026-8388

cve-icon Vulnrichment

Updated: 2026-05-12T18:28:17.148Z

cve-icon NVD

Status : Modified

Published: 2026-05-12T14:17:11.813

Modified: 2026-05-19T18:16:31.167

Link: CVE-2026-8388

cve-icon Redhat

Severity : Important

Publid Date: 2026-05-12T12:36:10Z

Links: CVE-2026-8388 - Bugzilla