CVE-2026-118008 Firefox - Privilege Escalation

Firefox before 159 contains a privilege escalation caused by a vulnerability in the DOM Navigation component, letting attackers escalate privileges, exploit requires unspecified conditions.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.35% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Privilege Escalation
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
27 October 2026
Updated
29 October 2026
Weakness
CWE-269

Vendor fix

Update to Firefox 159 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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