Description
A flaw was found in Clair. The fetcher component makes outbound HTTP requests to attacker-supplied URIs from manifest layer descriptors without IP or scheme filtering. When PSK authentication is not configured (opt-in, not enforced by default), an unauthenticated attacker can submit a manifest with a URI pointing to internal services or cloud metadata endpoints. The SSRF is reflective for non-200 responses, leaking up to 256 bytes of error body content via CheckResponse error messages. Operator-managed Red Hat Quay deployments auto-configure PSK and are not exposed to the unauthenticated attack vector.
Problem types
Server-Side Request Forgery (SSRF)
Product status
Timeline
| 2026-04-24: | Reported to Red Hat. |
| 2026-04-24: | Made public. |
Credits
Red Hat would like to thank Martin Brodeur for reporting this issue.
References
access.redhat.com/security/cve/CVE-2026-10517