Riskcovery

CVE-2026-8391

Other issue in the JavaScript Engine component

State
Published
Severity
5.3 Medium
Published
May 12, 2026
Updated
Jul 15, 2026
Reserved
May 12, 2026

Read the record on cve.org

Description

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

Scores

CVSSScoreVectorSource
3.15.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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-20 Improper Input Validation
  • CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-475 Undefined Behavior for Input to API

Affected Products

ProductVersions
FirefoxMozilla
  • 115.36 through 115.*Not affected
  • 140.11 through 140.*Not affected
  • 150.0.3 and laterNot affected
ThunderbirdMozilla
  • 140.11 and laterNot affected

References

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