Vulnerability record/PUBLISHED/Published Oct 27, 2026 14:06:01 UTC

CVE-2026-118013

Use-after-free in the Layout: Images, Video, and HTML Frames component. This vulnerability was fixed in Firefox 159 and Thunderbird 159.

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 16:32:51 UTC

PublishedOct 27, 2026 14:06:01 UTC

ReservedOct 27, 2026 14:06:00 UTC

Credits

OpenAI Codex Security (kylebot)