CVE-2026-8391

MEDIUM

Firefox < 150.0.3 - Memory Corruption in JavaScript Engine

Title source: llm
STIX 2.1

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.

References (5)

Core 5

Scores

CVSS v3 5.3
EPSS 0.0011
EPSS Percentile 28.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-119 CWE-20 CWE-79
Status published
Products (5)
mozilla/firefox < 150.0.3
Mozilla/Firefox 115.36 - 115.*
Mozilla/Firefox 140.11 - 140.*
Mozilla/Firefox 150.0.3
Mozilla/Thunderbird 140.11
Published May 12, 2026
Tracked Since May 12, 2026