CVE-2026-16355 (GCVE-0-2026-16355)

Vulnerability from cvelistv5 – Published: 2026-07-21 12:37 – Updated: 2026-07-22 19:18
VLAI
Title
JIT miscompilation in the JavaScript Engine: JIT component
Summary
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 15:37 UTC
CWE
  • CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
Assigner
mozilla CNA under the mitre root
CNA scorecard E 38/100 over 683 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Mozilla Firefox Unaffected: 115.38 , ≤ 115.* (rpm)
Unaffected: 140.13 , ≤ 140.* (rpm)
Unaffected: 153 , ≤ * (rpm)
guessed Create a notification for this product.
Mozilla Thunderbird Unaffected: 140.13 , ≤ 140.* (rpm)
Unaffected: 153 , ≤ * (rpm)
guessed Create a notification for this product.
Credits
Amy Burnett of OpenAI
Show details on NVD website
To clipboard 

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