CVE-2026-92289 Lemonldap::NG::Portal - Authentication Bypass

Lemonldap::NG::Portal 2.23.0 to before 2.23.4 for Perl contains a PKCE bypass caused by checkEndPointAuthenticationCredentials not verifying client secret for public Relying Parties, letting attackers exchange intercepted authorization codes for tokens, exploit requires intercepted authorization code.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
EPSS
0.39% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
25 September 2026
Updated
15 October 2026
Weakness
CWE-1390

Vendor fix

Upgrade to version 2.23.4 or later.

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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