CVE-2026-8388
medium
CVSS v3
6.5
CVSS v2
—
VIR risk
6.5
Description
Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.
Predictions
Exploit likelihood
75%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-8388
Vendor advisory: security@mozilla.org — https://www.mozilla.org/security/advisories/mfsa2026-45/
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:21381
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| debian | sid | fixed | 150.0.3-1 |
| debian | bookworm | fixed | 140.11.0esr-1~deb12u1 |
| debian | bullseye | fixed | 140.11.0esr-1~deb11u1 |
| debian | forky | fixed | 140.11.0esr-1 |
| debian | trixie | fixed | 140.11.0esr-1~deb13u1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| mozilla | firefox | {"endExcluding":"150.0.3"} | 150.0.3 |
References
- https://access.redhat.com/errata/RHSA-2026:21381
- https://bugzilla.mozilla.org/show_bug.cgi?id=2036978
- https://www.mozilla.org/security/advisories/mfsa2026-45/
- https://www.mozilla.org/security/advisories/mfsa2026-47/
- https://www.mozilla.org/security/advisories/mfsa2026-48/
- https://www.mozilla.org/security/advisories/mfsa2026-51/
- https://security-tracker.debian.org/tracker/CVE-2026-8388
CWEs
CWE-119
Verify integrity in audit chain (admin only). AS-IS.