CVE-2026-8389
published 2026-05-12CVE-2026-8389: JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.
PriorityP343high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.33%
25.3th percentile
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 150.0.3 | Firefox 150.0.3 |
| mozilla | firefox | < 150.0.3 | 150.0.3 |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_redhat7.3HIGH
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VulDB
Mozilla Firefox up to 150.0.2 JIT memory corruption (EUVD-2026-29464 / WID-SEC-2026-1503)
vuldb·2026-06-17·CVSS 8.8
CVE-2026-8389 [HIGH] Mozilla Firefox up to 150.0.2 JIT memory corruption (EUVD-2026-29464 / WID-SEC-2026-1503)
A vulnerability marked as critical has been reported in Mozilla Firefox up to 150.0.2. The affected element is an unknown function of the component JIT. The manipulation leads to memory corruption.
This vulnerability is uniquely identified as CVE-2026-8389. The attack is possible to be carried out remotely. No exploit exists.
It is suggested to upgrade the affected component.
GHSA
GHSA-qh6r-h4hf-pr8w: JIT miscompilation in the JavaScript Engine: JIT component
ghsa_unreviewed·2026-05-12
CVE-2026-8389 [HIGH] CWE-119 GHSA-qh6r-h4hf-pr8w: JIT miscompilation in the JavaScript Engine: JIT component
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.
Red Hat
firefox: JIT miscompilation in the JavaScript Engine: JIT component
vendor_redhat·2026-05-12·CVSS 7.3
CVE-2026-8389 [HIGH] CWE-733 firefox: JIT miscompilation in the JavaScript Engine: JIT component
firefox: JIT miscompilation in the JavaScript Engine: JIT component
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
JIT miscompilation in the JavaScript Engine: JIT component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: firefox (Red Hat Enterprise Linux 6) - Not affected
Package: firefox (Red Hat Enterprise Linux 7) - Not affected
Package: firefox (Red Hat Enterprise Linux 8) - Not affected
Package: firefox (Red Hat Enterprise Linux 9) - Not affected
Mozilla
Mozilla Foundation Security Advisory 2026-45: CVE-2026-8389
vendor_mozilla
CVE-2026-8389 Mozilla Foundation Security Advisory 2026-45: CVE-2026-8389
Mozilla Foundation Security Advisory 2026-45
CVE: CVE-2026-8389
Product: Firefox
Impact: high
Fixed in: Firefox 150.0.3
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=2036983https://www.mozilla.org/security/advisories/mfsa2026-45/https://access.redhat.com/security/cve/CVE-2026-8389https://bugzilla.redhat.com/show_bug.cgi?id=2476466https://github.com/crixpwn/CVE-2026-8389https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8389.json
2026-05-12
Published