DoS in Firefox Widget component before 154/ESR153.1
CVE-2026-74982 Published on August 18, 2026
Denial-of-service in the Widget component
Denial-of-service in the Widget component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Vulnerability Analysis
CVE-2026-74982 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2026-74982 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-74982
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Affected Versions
Mozilla Firefox:- Version 153.1, <= 153.* is unaffected.
- Version 154, <= * is unaffected.
- Version 153.1, <= 153.* is unaffected.
- Version 154, <= * is unaffected.