CVE-2026-111823 Mage OSS - Authentication Bypass

Mage OSS <= 0.9.80 before 76c4f46 contains an authentication bypass caused by improper handling of unknown OAuth providers during session creation, letting attackers bypass authentication, exploit requires encountering an unknown OAuth provider.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
Proof of concept available
Authentication
Not required
EPSS
0.37% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Authentication
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
17 October 2026
Updated
19 October 2026
Weakness
CWE-390

Vendor fix

Update to the version after 76c4f46 or latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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