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Mozilla Firefox EUVD-2026-30912

| CVE-2026-8961 MEDIUM
Authentication Bypass by Spoofing (CWE-290)
2026-05-19 mozilla GHSA-5qxp-cr8v-39px
6.5
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

3
Analysis Generated
May 20, 2026 - 17:29 vuln.today
CVSS changed
May 20, 2026 - 17:22 NVD
6.5 (MEDIUM)
CVE Published
May 19, 2026 - 12:29 nvd
UNKNOWN (no severity yet)

DescriptionNVD

Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.

AnalysisAI

Spoofing via the Form Autofill component in Mozilla Firefox allows a network-based attacker to achieve high integrity impact against users who interact with attacker-controlled content. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N) confirms no authentication is required from the attacker side, but a victim must interact with malicious content for the attack to succeed. …

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Vendor StatusVendor

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EUVD-2026-30912 vulnerability details – vuln.today

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