CVE-2026-8391

MEDIUM EPSS 11.8%
Published May 12, 20261mo ago · Modified Jun 17, 20261w ago
5.3 CVSS 3.1
Medium
Find Similar
Published May 12, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

CVSS Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
11.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 3

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Memory Safety
CWE-20 Improper Input Validation Validation
CWE-79 Cross-site Scripting Injection

Affected Products 1

VendorProductVersionRange
mozillafirefox* <150.0.3

References 5

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=2038575
    Permissions Required
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-45/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-47/
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-48/
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-51/

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.