CVE-2026-8389

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.

CVSS 3.1

8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.3% chance of exploitation in the next 30 days; higher than 26% of CVEs (scores of 2026-10-26)

CWEs

CWE-119, CWE-686, CWE-843, CWE-733

Published

2026-05-12

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• mozilla:firefox

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2036983
• https://www.mozilla.org/security/advisories/mfsa2026-45/
• https://access.redhat.com/security/cve/CVE-2026-8389
• https://bugzilla.redhat.com/show_bug.cgi?id=2476466
• https://github.com/crixpwn/CVE-2026-8389

Check your stackJSON