CVE-2026-100830
Mitigation bypass in the DOM: Navigation component
HIGH
8.1
CVSS Score
Published: September 29, 2026 at 12:36 PM UTC
Updated: October 13, 2026 at 03:28 PM UTC
2 products affected across 1 vendorFirefoxThunderbird
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Severity
HIGH8.1
Exploit prediction
EPSS 0.1%
SSVC
No known exploit
Description
Mitigation bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
All versionsv < 153.4.0154.0.0 ≤ v < 157.0.0
Vendor states this is fixed in 153.4 (unaffected)
Vendor states this is fixed in 157 (unaffected)
All versionsv < 153.4.0154.0 ≤ v < 157.0
Vendor states this is fixed in 153.4 (unaffected)
Vendor states this is fixed in 157 (unaffected)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (5)
SSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
8.1HIGHCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusANALYZED
CWE
CWE-346
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