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CVE-2026-73208
7.4 HIGH
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CVSS version (CVSS): 3.1
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Attack Vector (AV): Network (N)
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Attack Complexity (AC): High (H)
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Privileges Required (PR): None (N)
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User Interaction (UI): None (N)
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Scope (S): Unchanged (U)
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Confidentiality (C): High (H)
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Integrity (I): High (H)
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Availability (A): None (N)
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Modified Attack Vector (MAV): Network (N)
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Modified Attack Complexity (MAC): High (H)
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Modified Privileges Required (MPR): None (N)
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Modified User Interaction (MUI): None (N)
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Modified Confidentiality (MC): High (H)
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Modified Scope (MS): Unchanged (U)
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Modified Integrity (MI): High (H)
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Modified Availability (MA): None (N)
created
2 weeks, 4 days ago
Activity log
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Created & dismissed (no matching packages found) suggestion
2 weeks, 4 days ago
An attacker that holds a token intended for a different …
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.
Affected products
OX Dovecot CE
OX Dovecot Pro