nextlevelbuilder GoClaw exec_approval.go isSafeBin improper authorization
Priority MEDIUM 57CWE-266Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Privilege escalation, Security bypass
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-266 and CWE-285.
Summary
A vulnerability was identified in nextlevelbuilder GoClaw up to 3.13.2. Affected is the function isSafeBin of the file internal/tools/exec_approval.go. The manipulation leads to improper authorization. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00366 30th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| nextlevelbuilder | GoClaw | 3.13.0; 3.13.1; 3.13.2 | — | No fix listed | CNA |
- GoClaw Vendornextlevelbuilder Affected 3.13.0; 3.13.1; 3.13.2 Fixed in — No fix listed CNA
CPE names CNA · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nextlevelbuilder:goclaw:*:*:*:*:*:*:*:* | — | — | nextlevelbuilder |
- cpe:2.3:a:nextlevelbuilder:goclaw:*:*:*:*:*:*:*:* Versions — — ·nextlevelbuilder
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-16121
- 2026-10-03 Alias added: GHSA-952r-63wr-g75f
References
More nextlevelbuilder vulnerabilities
- TI-2026-09124 nextlevelbuilder GoClaw Webhook Verification auth.go resolveAuth missing authentication CVSS 4.0MEDIUM 6.9
- TI-2026-08957 nextlevelbuilder GoClaw write_file Tool fsbridge.go FsBridge.WriteFile os command injection CVSS 4.0MEDIUM 6.9
- TI-2026-14855 nextlevelbuilder GoClaw jq Handler tools_invoke.go ExecTool.Execute information disclosure CVSS 4.0MEDIUM 5.3
- TI-2026-13540 nextlevelbuilder GoClaw credentialed_exec.go ExecTool.Execute improper authorization CVSS 4.0MEDIUM 5.3
- TI-2026-13494 nextlevelbuilder GoClaw web_fetch web_shared.go isPrivateIP server-side request forgery CVSS 4.0MEDIUM 5.3
- TI-2026-13493 nextlevelbuilder GoClaw Invoke Endpoint tools_invoke.go ToolsInvokeHandler.ServeHTTP authorization CVSS 4.0MEDIUM 5.3
Sources
- CVE-2026-16121 · CVE Program
- CVE-2026-16121 · NVD
- FIRST EPSS
- GHSA-952r-63wr-g75f · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences