Auth bypass in Crestalnetwork Intentkit
CVE-2026-76066
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- www.lasso.security/vulnerability-database/cve-2026-76066 (technical-description)
- www.vulncheck.com/advisories/intentkit-executor-tool-authorization-bypass-via-t… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-76066?
- CVE-2026-76066 is a high-severity vulnerability in Crestalnetwork Intentkit, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-10-15.
- How severe is CVE-2026-76066?
- High severity. CVSS v3 base score is 7.5 out of 10.