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CVE Vulnerability Details :
CVE-2026-8960
PUBLISHED
More InfoOfficial Page
Assigner-mozilla
Assigner Org ID-f16b083a-5664-49f3-a51e-8d479e5ed7fe
View Known Exploited Vulnerability (KEV) details
Published At-19 May, 2026 | 12:29
Updated At-19 May, 2026 | 17:10
Rejected At-
▼CVE Numbering Authority (CNA)
Spoofing issue in WebExtensions

Spoofing issue in WebExtensions. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

Affected Products
Vendor
Mozilla CorporationMozilla
Product
Firefox
Versions
Unaffected
  • From 151 through * (rpm)
Vendor
Mozilla CorporationMozilla
Product
Thunderbird
Versions
Unaffected
  • From 151 through * (rpm)
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Kanaru Sato
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://bugzilla.mozilla.org/show_bug.cgi?id=1940116
N/A
https://www.mozilla.org/security/advisories/mfsa2026-46/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-50/
N/A
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1940116
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-46/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-50/
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-290CWE-290 Authentication Bypass by Spoofing
Type: CWE
CWE ID: CWE-290
Description: CWE-290 Authentication Bypass by Spoofing
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found