Riskcovery

CVE-2026-12299

JIT miscompilation in the DOM: Core & HTML component

State
Published
Severity
5.4 Medium
Published
Jun 16, 2026
Updated
Jul 15, 2026
Reserved
Jun 15, 2026

Read the record on cve.org

Description

JIT miscompilation in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

Scores

CVSSScoreVectorSource
3.15.4 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:NCISA-ADP
3.17.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:Hredhat-SADP

Weaknesses

  • CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
  • CWE-733 Compiler Optimization Removal or Modification of Security-critical Code

Affected Products

ProductVersions
FirefoxMozilla
  • 115.37 through 115.*Not affected
  • 140.12 through 140.*Not affected
  • 152 and laterNot affected
ThunderbirdMozilla
  • 140.12 through 140.*Not affected
  • 152 and laterNot affected

References

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