CVE-2026-2804 Details
Description
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.
A use-after-free vulnerability has been identified in the WebAssembly component of Mozilla Firefox and Thunderbird. This issue affects Firefox and Thunderbird versions prior to 148. The vulnerability arises from improper memory management, which could potentially be exploited to execute arbitrary code.
Users can upgrade to Firefox 148 or Thunderbird 148 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 Feb 24, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=2013584 | [email protected] | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2026-13/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-16/ | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| mozilla firefox | < 148.0 |
CPE
Remediation
| |
| mozilla thunderbird | < 148.0 |
CPE
Remediation
| |
Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Apr 13, 2026 | CVE Modified | [email protected] |
| Feb 25, 2026 | Initial Analysis | [email protected] |
| Feb 24, 2026 | CVE Modified | [email protected] |
| Feb 24, 2026 | CVE Modified | CISA-ADP |
| Feb 24, 2026 | New CVE Received | [email protected] |