CVE-2026-6779

MEDIUM EPSS 10.9%
Published Apr 21, 20262mo ago · Modified Jun 17, 20261w ago
5.3 CVSS 3.1
Medium
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Published Apr 21, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

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
10.9% 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 2

VendorProductVersionRange
mozillafirefox* <150.0
mozillathunderbird* <150.0

References 3

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=2023343
    Permissions Required
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-30/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-33/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.