Vulnerability record/PUBLISHED/Published Oct 27, 2026 14:05:43 UTC

CVE-2026-117969

Invalid pointer in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Base score8.8/ 10

SeverityHighCVSS 3.1

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityHigh

Attack vectorNetworkAV

Attack complexityLowAC

Privileges requiredNonePR

User interactionRequiredUI

ScopeUnchangedS

Confidentiality impactHighC

Integrity impactHighI

Availability impactHighA

CVSS vector stringCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering Authoritymozilla

Last updatedNov 5, 2026 15:54:21 UTC

PublishedOct 27, 2026 14:05:43 UTC

ReservedOct 27, 2026 14:05:43 UTC

Credits

Mozilla