AgenticMail prior 0.9.64 Task Management pending GET /api/agenticmail/tasks/pending assignee authorization

Summaryinfo

A vulnerability identified as critical has been detected in AgenticMail. This affects the function GET /api/agenticmail/tasks/pending of the file /api/agenticmail/tasks/pending of the component Task Management. The manipulation of the argument assignee leads to authorization. This vulnerability is referenced as CVE-2026-57494. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in AgenticMail and classified as critical. This issue affects the function GET /api/agenticmail/tasks/pending of the file /api/agenticmail/tasks/pending of the component Task Management. The manipulation of the argument assignee with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

AgenticMail gives AI agents real email addresses and phone numbers. In @agenticmail/api prior to version 0.9.64, a low-privileged authenticated AgenticMail agent can enumerate another agent's pending/claimed tasks by supplying the target agent name to `GET /api/agenticmail/tasks/pending?assignee=<name>`. The returned task objects include the task IDs and payloads. The same task IDs can then be used with the capability-style task mutation endpoints (`/tasks/:id/claim`, `/tasks/:id/result`, `/tasks/:id/complete`, `/tasks/:id/fail`) to claim, complete, or fail tasks assigned to a different agent. Because ordinary authenticated agents can discover agent names through `GET /api/agenticmail/accounts/directory`, the task ID effectively stops being a secret capability. This turns the intended capability model into a cross-agent authorization bypass. Version 0.9.64 contains a fix.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-57494 since 06/24/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 0.9.64 eliminates this vulnerability.

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Productinfo

Type

• Mail Server Software

Name

• AgenticMail

Website

• Product: https://github.com/agenticmail/agenticmail/

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