Firefox/Thunderbird JIT Invalid Pointer Vulnerability (fixed in 159/153.6)
CVE-2026-117982 Published on October 27, 2026
Invalid pointer in the JavaScript Engine: JIT component
Invalid pointer in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Vulnerability Analysis
CVE-2026-117982 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 be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-117982 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-117982
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Affected Versions
Mozilla Firefox:- Version 153.6, <= 153.* is unaffected.
- Version 159, <= * is unaffected.
- Version 153.6, <= 153.* is unaffected.
- Version 159, <= * is unaffected.