A flaw was found in the Quay config-tool's LDAP and SMTP validation functions. An attacker with config editor access can exploit these functions, which make outbound connections to user-supplied endpoints without proper IP or host filtering. This allows the attacker to perform internal network reconnaissance from the Quay pod's network position, potentially mapping the internal network infrastructure.

The Quay config-tool's GitLab OAuth validator in pkg/lib/shared/validators.go (line 804) places clientid and clientsecret as plaintext URL querystring parameters when making POST requests to the configured GitLab endpoint. This causes credentials to leak into server access logs, reverse proxy logs, WAF logs, CDN logs, and OpenTelemetry traces even when the endpoint is the legitimate gitlab.com. The GitHub OAuth validator correctly uses HTTP Basic Auth headers and is not affected.