Authentication Bypass by Spoofing (CWE-290)
7.5
CVSS 3.1
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CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Lifecycle Timeline
1
CVE Published
May 19, 2026 - 12:29 nvd
UNKNOWN (no severity yet)
DescriptionNVD
Spoofing issue in WebExtensions. This vulnerability was fixed in Firefox 151.
Analysis
Spoofing issue in WebExtensions. This vulnerability was fixed in Firefox 151.
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Vendor StatusVendor
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External POC / Exploit Code
Leaving vuln.today
Destination URL
POC code from unknown sources may be malicious, contain backdoors, or be fake.
Always review and test exploit code in a safe, isolated environment (VM/sandbox).
Verify the source reputation and cross-reference with known databases (Exploit-DB, GitHub Security).
EUVD-2026-30909
GHSA-57v8-q85x-pwx6