CrestalNetwork IntentKit up to 2.6.3 ToolBindingMiddleware authorization

Summaryinfo

A vulnerability was found in CrestalNetwork IntentKit up to 2.6.3. It has been rated as problematic. This affects an unknown part of the component ToolBindingMiddleware. The manipulation leads to authorization. This vulnerability is referenced as CVE-2026-76066. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in CrestalNetwork IntentKit up to 2.6.3. This issue affects an unknown function of the component ToolBindingMiddleware. The manipulation 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 integrity. The summary by CVE is:

IntentKit through 2.6.3 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.

It is possible to read the advisory at lasso.security. The identification of this vulnerability is CVE-2026-76066 since 08/18/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/15/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• CrestalNetwork

Name

• IntentKit

Version

• 2.6.0
• 2.6.1
• 2.6.2
• 2.6.3

CPE 2.3info

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CPE 2.2info

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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