CVE-2026-8388

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-8388
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.

6.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=2036978 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-45/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-47/
https://www.mozilla.org/security/advisories/mfsa2026-48/
https://www.mozilla.org/security/advisories/mfsa2026-51/
Configurations

Configuration 1 (hide)

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

19 May 2026, 18:16

Type Values Removed Values Added
Summary (en) 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. (en) 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
  • () https://www.mozilla.org/security/advisories/mfsa2026-51/ -

19 May 2026, 14:16

Type Values Removed Values Added
References
  • () https://www.mozilla.org/security/advisories/mfsa2026-47/ -
  • () https://www.mozilla.org/security/advisories/mfsa2026-48/ -
Summary (en) Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3. (en) 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.

12 May 2026, 19:48

Type Values Removed Values Added
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
References () https://bugzilla.mozilla.org/show_bug.cgi?id=2036978 - () https://bugzilla.mozilla.org/show_bug.cgi?id=2036978 - Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2026-45/ - () https://www.mozilla.org/security/advisories/mfsa2026-45/ - Vendor Advisory
First Time Mozilla
Mozilla firefox

12 May 2026, 19:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.5
CWE CWE-119

12 May 2026, 14:20

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-12 14:17

Updated : 2026-05-19 18:16

NVD link : CVE-2026-8388

Mitre link : CVE-2026-8388

CVE.ORG link : CVE-2026-8388

JSON object : View

Products Affected

mozilla

  • firefox
CWE
CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer