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 (29)

Core 29
Core References

Scores

CVSS v3 5.3
EPSS 0.0030
EPSS Percentile 21.6%
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-475 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