Use-after-free in the JavaScript: WebAssembly component.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Feb 24, 2026 · NIST NVD

   Detected

   Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

2. Jun 17, 2026 · NIST NVD

   Updated

   Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

Affected

• cpe mozilla/firefoxversion unspecified
• cpe mozilla/thunderbirdversion unspecified

Sources

• NIST NVDVulnerability recordCVE-2026-2804

  Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

  nvd.nist.gov

References

• Permissions Required · bugzilla.mozilla.org
• Vendor Advisory · mozilla.org
• Vendor Advisory · mozilla.org