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OpenClaw CVE-2026-53814

| EUVD-2026-36320 HIGH
Incorrect Privilege Assignment (CWE-266)
2026-06-11 VulnCheck
Privilege Escalation Openclaw
8.7
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
8.7 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/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
vuln.today AI
8.3 HIGH

Network-reachable /hooks/agent endpoint, low complexity, requires a valid hook token (PR:L), no user interaction; owner-scope MCP access yields high C/I and limited availability impact via cron-state changes.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Jun 11, 2026 - 21:24 vuln.today

DescriptionCVE.org

OpenClaw before 2026.5.20 contains a privilege escalation vulnerability where hook-triggered agent runs incorrectly receive owner-scoped MCP loopback authority instead of hook-appropriate scope. Attackers with a valid hook token can exploit the /hooks/agent endpoint to cause spawned CLI runtimes to access or invoke owner-only MCP tools, potentially executing privileged actions like persistent cron state modifications.

AnalysisAI

Privilege escalation in OpenClaw before 2026.5.20 allows attackers holding a valid hook token to invoke owner-only MCP tools through the /hooks/agent endpoint, because hook-triggered agent runs are incorrectly granted owner-scoped MCP loopback authority. Successful exploitation lets a low-privileged hook caller execute privileged actions such as modifying persistent cron state, with no public exploit identified at time of analysis.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain valid hook token
Delivery
Reach /hooks/agent over network
Exploit
Trigger hook-driven agent run
Execution
Spawned CLI inherits owner MCP scope
Persist
Invoke owner-only MCP tools
Impact
Modify persistent cron state for persistence
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Vulnerability AssessmentAI

Exploitation Requires a valid OpenClaw hook token and network reachability to the /hooks/agent endpoint on an OpenClaw instance prior to 2026.5.20; the vulnerable path is specifically hook-triggered agent runs that spawn CLI runtimes communicating with MCP tools over the loopback authority channel. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L) and base score 8.7 reflect a network-reachable, low-complexity flaw requiring only low privileges (a valid hook token) and no user interaction, with high confidentiality and integrity impact on the vulnerable system - consistent with the described owner-scope takeover via MCP. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who has obtained a low-privilege hook token - for example through a leaked CI secret, a compromised integration, or a token issued for a narrow automation - sends a crafted request to /hooks/agent that triggers an agent run. The spawned CLI runtime inherits owner-scoped MCP loopback authority and is used to invoke owner-only MCP tools, modifying persistent cron state to schedule attacker-controlled jobs for follow-on execution and persistence. …
Remediation Vendor-released patch: upgrade OpenClaw to 2026.5.20 or later, per the GHSA-6fvr-66p3-3qj4 advisory (https://github.com/openclaw/openclaw/security/advisories/GHSA-6fvr-66p3-3qj4). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Inventory all OpenClaw deployments and document current versions. …

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CVE-2026-53814 vulnerability details – vuln.today
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