CVE-2026-53818 json
OpenClaw < 2026.4.24 - Owner-Only Tool Policy Bypass via MCP Loopback
published 2026-06-11 4 mo ago modified 2026-07-02 4 mo ago also GHSA-rj6p-xmxr-qj4h , EUVD-2026-36324
- cvss
- 6.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 0%
- public exploits
- 0
- none known
Summary
OpenClaw before 2026.4.24 contains an authorization bypass vulnerability in the MCP loopback feature that allows non-owner callers to skip owner-only tool policies and before-tool-call hooks. Attackers can invoke owner-only behavior through the affected loopback path to execute restricted tools when the feature is enabled and reachable.
Patch / fix
- npm openclaw 2026.4.24
- OpenClaw OpenClaw 2026.4.24
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.10% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N |
| CNA | 3.1 | 6.6 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| GitHub | 3.1 | 6.6 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | openclaw | <2026.4.24 |
2026.4.24 |
Affected products
- OpenClaw OpenClaw
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/openclaw/openclaw/security/advisories/GHSA-rj6p-xmxr-qj4h
vendor-advisory, web, mitigation
-
vulncheck.com
/advisories/openclaw-owner-only-tool-policy-bypass-via-mcp-loopback
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-53818
advisory
-
github.com
/openclaw/openclaw
package
Sources
- CVE List CVE-2026-53818
- GitHub Advisory GHSA-rj6p-xmxr-qj4h
- NVD CVE-2026-53818
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