CVE-2026-75874

Description

Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154 and Thunderbird 154.

CVSS Vector

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2039972
• https://www.mozilla.org/security/advisories/mfsa2026-74/
• https://www.mozilla.org/security/advisories/mfsa2026-78/