Firefox <=148 Info Disclosure via JIT Miscomp
CVE-2026-2783 Published on February 24, 2026
Information disclosure due to JIT miscompilation in the JavaScript Engine: JIT component
Information disclosure due to JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 148 and Firefox ESR < 140.8.
Vulnerability Analysis
CVE-2026-2783 can be exploited 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 have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is an Information Disclosure Vulnerability?
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CVE-2026-2783 has been classified to as an Information Disclosure vulnerability or weakness.
Products Associated with CVE-2026-2783
stack.watch emails you whenever new vulnerabilities are published in Mozilla Firefox or Mozilla FireFox Extended Support Release (ESR). Just hit a watch button to start following.
Affected Versions
Mozilla Firefox:- Version unspecified and below 148 is affected.
- Version unspecified and below 140.8 is affected.
- Version unspecified and below 148 is affected.
- Version unspecified and below 140.8 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.