CVE Catalog

CVE-2026-6779

MediumCVSS 5.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.21%

11th percentile - higher than 11% of all known CVEs

Summary

An issue exists in the JavaScript Engine component of Firefox and Thunderbird. The vulnerability was fixed in Firefox 150 and Thunderbird 150.

Risk Assessment

A flaw in the JavaScript engine could potentially lead to unexpected application behavior when processing malicious web or message content. Organizations using vulnerable versions are exposed to exploitation risk.

Recommendation

Update Firefox and Thunderbird to version 150 or later. Deploy the updates through your standard patch management process.

Related vulnerabilities

Original NVD description (English source)

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS