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mozjs52

mozjs38

mozjs68

mozjs102

mozjs78

mozjs91

thunderbird

mozjs115

CVE-2026-109721 is a vulnerability involving incorrect boundary conditions in the JavaScript Engine's JIT component. This flaw was addressed and fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. The vulnerability has a medium severity rating with a CVSS score of 5.4. It does not have known exploits in the wild. Multiple specific affected versions of the mozjs52 package are identified.

This vulnerability is caused by incorrect boundary conditions in the Just-In-Time (JIT) compilation component of the JavaScript Engine (mozjs52). It was fixed in Firefox 158 and related ESR and Thunderbird versions. The issue could potentially lead to impacts on confidentiality and integrity but does not affect availability. The vendor advisory confirms the fix and lists this vulnerability among multiple high-impact bugs addressed in the Firefox 158 release.

CVE-2026-109721 is a vulnerability involving incorrect boundary conditions in the JavaScript Engine's JIT component. This flaw was addressed and fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. The vulnerability has a medium severity rating with a CVSS score of 5.4. I

Mozjs52: Incorrect boundary conditions in the JavaScript Engine: JIT component. (CVE-2026-109721)

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