JIT Miscompilation Vulnerability in Firefox by Mozilla
CVE-2026-100792

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 29 September 2026

What is CVE-2026-100792?

A JIT miscompilation vulnerability exists in the JavaScript: WebAssembly component of Firefox, which can lead to unexpected behavior or potential security risks. This issue has been addressed in specific versions of Firefox, including Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. Users are encouraged to update their browsers to mitigate any potential threats.

Affected Version(s)

Firefox 140.17

Firefox 153.4

Firefox 157

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2073266

https://www.mozilla.org/security/advisories/mfsa2026-100/

https://www.mozilla.org/security/advisories/mfsa2026-97/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Sep 29, 2026
Vulnerability Reserved
Sep 26, 2026

Credit

Amy Burnett of OpenAI

CVE-2026-100792 Data

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