Riskcovery

CVE-2026-0877

Mitigation bypass in the DOM: Security component

State
Published
Severity
8.1 High
Published
Jan 13, 2026
Updated
Jul 15, 2026
Reserved
Jan 13, 2026

Read the record on cve.org

Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Scores

CVSSScoreVectorSource
3.18.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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-693 Protection Mechanism Failure

Affected Products

ProductVersions
FirefoxMozilla
  • 115.32 through 115.*Not affected
  • 140.7 through 140.*Not affected
  • 147 and laterNot affected
ThunderbirdMozilla
  • 140.7 through 140.*Not affected
  • 147 and laterNot affected

References

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