Firefox 150 JIT Boundary Condition Vulnerability in JS Engine
CVE-2026-8388 Published on May 12, 2026
Incorrect boundary conditions in the JavaScript Engine: JIT component
Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.
Vulnerability Analysis
CVE-2026-8388 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 a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a Buffer Overflow Vulnerability?
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
CVE-2026-8388 has been classified to as a Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2026-8388
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Affected Versions
Mozilla Firefox:- Version 115.36, <= 115.* is unaffected.
- Version 140.11, <= 140.* is unaffected.
- Version 150.0.3, <= * is unaffected.
- Version 140.11, <= * is unaffected.