{"id":"AZL-98295","summary":"CVE-2026-73208 affecting package dovecot 2.3.20-1","details":"An attacker that holds a token intended for a different purpose can authenticate, because when an OAuth2 token response does not contain a scope claim, the audience claim is used in its place and checked against the configured required scopes. These are different concepts, and the audience claim does not describe what a token is allowed to do. A token that grants no relevant permissions can be accepted because its intended recipient value happens to match a configured scope name, granting access that should have been denied. It also hides an identity provider misconfiguration where scopes are not being issued at all. Ensure the identity provider issues a scope claim for all tokens used with Dovecot, and that configured scope names do not match audience values. Update to non-vulnerable version. No publicly available exploits are known.","modified":"2026-09-03T05:28:38Z","published":"2026-08-28T12:16:31Z","upstream":["CVE-2026-73208"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73208"}],"affected":[{"package":{"name":"dovecot","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/dovecot"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.3.20-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-98295.json"}}],"schema_version":"1.9.0"}