CVE-2026-76066 IntentKit 2.6.3 Executor Tool Authorization Bypass via ToolNode
Attackers can bypass authorization checks to execute owner-only tools like wallet transfers via prompt injection or thread replay in IntentKit.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76066?
CVE-2026-76066 is a high-severity missing authorization vulnerability in crestalnetwork intentkit, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
IntentKit through 2.6.3, fixed in commit 5b91da5, contains an authorization bypass vulnerability where the executor validates tool calls against the full tool registry rather than the per-request narrowed tool advertisement enforced by ToolBindingMiddleware, allowing owner-only state-changing tools such as wallet transfer, posting, memory-write, and call-agent to execute without any human-in-the-loop or approval gate. An unauthenticated or public caller in WEB, API, TWITTER, or TELEGRAM contexts can exploit this by supplying the exact de-advertised tool name and arguments via indirect prompt injection or by replaying checkpoint and history data on a reused thread, achieving unauthorized execution of owner-restricted capabilities.
Weakness: CWE-862
Which versions are affected by CVE-2026-76066?
How do I fix CVE-2026-76066?
No fix has been published for CVE-2026-76066 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-76066 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76066 exists.
Sources
Also known as GHSA-6qqv-mhm9-qrfj.