Vulnerability details

CVE-2026-100830

Mitigation bypass in the DOM: Navigation component

CVSS 3.1

8.1High

Official description

Mitigation bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.

CVSS scores

Score	Version	Source	Vector
8.1High	3.1	CISA ADP / Vulnrichment (CISA-ADP)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N`

Affected products

Vendor	Product	Versions	Source
No product information recorded.

References and advisories

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Details

Published: 2026-09-29
Last updated: 2026-10-01
State: Published
Assigner (CNA): mozilla

Exploit prediction (EPSS)

0.13%

Probability of exploitation in 30 days

2.9%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-346
Origin Validation Error