Is CVE-2026-109561 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109561?

CVE-2026-109561 has a CVSS v3 severity of MEDIUM (4.2).

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CVE-2026-109561

Description

goose from 1.28.0 before 1.44.0 contains an authorization bypass vulnerability that allows tools to run without user approval in Manual Approval mode because persisted read-only annotations are never cleared by update_goose_mode. After a session uses Smart Approval mode, prompt-injected calls to tools annotated readOnlyHint: true execute without prompting, bypassing the user's selected approval mode in PermissionInspector::inspect.