CVE-2026-74241
MediumCVSS 4.8Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
Summary
In Red Hat Quay's external 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 DN.
Risk Assessment
This could also potentially influence which DN is used for password binding in multi-domain Active Directory environments, potentially leading to unauthorized access.
Recommendation
Update Red Hat Quay to a patched version and ensure proper input escaping.
Original NVD description (English source)
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.