Privilege escalation in the DOM: Navigation component
CVE-2026-118008

8.8HIGH

Key Information:

Vendor

Mozilla
Status
Firefox
Vendor
CVE Published:
27 October 2026

What is CVE-2026-118008?

Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 159.

Affected Version(s)

Firefox 159

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2075440
https://www.mozilla.org/security/advisories/mfsa2026-118/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Amy Burnett of OpenAI
.