CVE-2026-74942 vulnerability in Mozilla Products
Published on August 18, 2026
Privilege escalation in the Remote Settings Client component
Privilege escalation in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Vulnerability Analysis
CVE-2026-74942 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH
Weakness Type
Improper Privilege Management
The software does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Products Associated with CVE-2026-74942
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Affected Versions
Mozilla Firefox:- Version 115.39, <= 115.* is unaffected.
- Version 140.14, <= 140.* is unaffected.
- Version 153.1, <= 153.* is unaffected.
- Version 154, <= * is unaffected.
- Version 140.14, <= 140.* is unaffected.
- Version 153.1, <= 153.* is unaffected.
- Version 154, <= * is unaffected.