CVE-2026-6777

Other issue in the Networking: DNS component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

Score

CVSS 3.1 5.3 Medium

Status

Analyzed - security@mozilla.org

Published

2026-04-21

Last modified

2026-10-25

Weaknesses

CWE-20, CWE-352, CWE-400

Affected products

• Firefox (Mozilla)
• Thunderbird (Mozilla)

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2022726
• https://www.mozilla.org/security/advisories/mfsa2026-30/
• https://www.mozilla.org/security/advisories/mfsa2026-33/