CVE-2026-74241
Quay: ldap referral filter injection in quay external ldap authentication
CVSS Score
4.8
EPSS Score
0.0%
EPSS Percentile
0th
A flaw was found in Red Hat Quay's external Lightweight Directory Access Protocol (LDAP) authentication handling. When an LDAP referral is returned during authentication, the system does not properly escape the username input. This allows an attacker to inject LDAP filter metacharacters, enabling user-existence oracle attacks at the referral Directory Name (DN). This could also potentially influence which DN is used for password binding in multi-domain Active Directory environments.
| CWE | CWE-90 |
| Vendor | red hat |
| Product | red hat openshift update service |
| Published | Aug 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Red Hat / Red Hat OpenShift Update Service
All versions affected Red Hat / Red Hat Quay 3
All versions affected Red Hat / Red Hat Quay 3
All versions affected References
Credits
Red Hat would like to thank meifukun (https://github.com/meifukun) for reporting this issue.