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CVE-2026-84133 Details
Description
Site isolation issue in the DOM: Push Subscriptions component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Sep 3, 2026Exploitation: NoneAutomatable: YesTechnical Impact: Total
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=2032388 | [email protected] | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2026-82/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-85/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-86/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-88/ | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-346 | Origin Validation Error | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| mozilla firefox | < 153.2.0 >= 154.0.0, < 155.0.0 |
CPE
Remediation
| |
| mozilla thunderbird | < 153.2.0 >= 154.0, < 155.0 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 3, 2026 | Initial Analysis | [email protected] |
| Sep 3, 2026 | CVE Modified | CISA-ADP |
| Sep 1, 2026 | CVE Modified | [email protected] |
| Sep 1, 2026 | New CVE Received | [email protected] |