Riskcovery

CVE-2026-16363

JIT miscompilation in the JavaScript: WebAssembly component

State
Published
Severity
9.8 Critical
Published
Jul 21, 2026
Updated
Jul 22, 2026
Reserved
Jul 20, 2026

Read the record on cve.org

Description

JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCISA-ADP

Weaknesses

  • CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
  • CWE-682 Incorrect Calculation

Affected Products

ProductVersions
FirefoxMozilla
  • 140.13 through 140.*Not affected
  • 153 and laterNot affected
ThunderbirdMozilla
  • 140.13 through 140.*Not affected
  • 153 and laterNot affected

References

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