CVE-2026-8390 Details
Description
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150.0.3.
A use-after-free vulnerability has been identified in the WebAssembly component of Mozilla Firefox. This issue allows for memory management errors that could potentially be exploited. The vulnerability affects Firefox versions prior to 150.0.3.
Users can upgrade to Firefox version 150.0.3 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-8390 | redhat-SADP | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2476474 | redhat-SADP | |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8390.json | redhat-SADP | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=2038081 | [email protected] | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2026-45/ | [email protected] | Vendor Advisory |
Weakness Enumeration
Affected Products
| Product | Versions |
|---|---|
| mozilla firefox | < 150.0.3 |
CPE
Remediation
| |
Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| May 14, 2026 | Initial Analysis | [email protected] |
| May 13, 2026 | CVE Modified | CISA-ADP |
| May 12, 2026 | New CVE Received | [email protected] |