CVE-2026-8388
Incorrect boundary conditions in the JavaScript Engine: JIT component
- State
- Published
- Severity
- 6.5 Medium
- Published
- May 12, 2026
- Updated
- Jul 15, 2026
- Reserved
- May 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | CISA-ADP |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | redhat-SADP |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
FirefoxMozilla |
|
ThunderbirdMozilla |
|
References
- 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://access.redhat.com/security/cve/CVE-2026-8388vdb-entry
- RHBZ#2476469issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8388.json
- https://access.redhat.com/errata/RHSA-2026:26551vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:27715vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26539vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:21380vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:22325vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:21382vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:22643vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26629vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26270vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26606vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26536vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26630vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26268vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26491vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26269vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26493vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26174vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26492vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:26521vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:21378vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:21381vendor-advisory
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