The docker_pull module uses the realm parameter from a Docker registry's WWW-Authenticate response header as the authentication endpoint without validation. An attacker in a man-in-the-middle position between bbot and a Docker registry could modify this header to redirect the authentication request to an arbitrary endpoint, potentially leaking authentication tokens.
{
"nvd_published_at": "2026-06-17T23:17:03Z",
"github_reviewed_at": "2026-06-18T15:03:25Z",
"github_reviewed": true,
"severity": "LOW",
"cwe_ids": [
"CWE-20",
"CWE-918"
]
}