CVEvulnerability
CVE-2026-8948
9.1 CRITICAL
Official page ↗
- Status
- Modified
- Published
- 2026-05-19
- Last modified
- 2026-10-14
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-79, CWE-942
Description
Same-origin policy bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Affected configurations
• mozilla firefox (< 151.0.0)
• mozilla thunderbird (< 151.0.0)
Related
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2038803 Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2026-46/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-50/ Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-8948 access.redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2479850 bugzilla.redhat.com
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8948.json security.access.redhat.com