CVE-2026-8948

CRITICAL EPSS 31.1%
Published May 19, 20261mo ago · Modified Jun 17, 20261w ago
9.1 CVSS 3.1
Critical
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Published May 19, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago

Description

Same-origin policy bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

CVSS Details

Base Score
9.1
Exploitability
3.9
Impact
5.2
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
31.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-942

Affected Products 2

VendorProductVersionRange
mozillafirefox* <151.0.0
mozillathunderbird* <151.0.0

References 3

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=2038803
    Permissions Required
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-46/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-50/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.