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How CVE-2026-32906 Works
OpenClaw before version 2026.5.12 contains a privilege escalation vulnerability in its Slack plugin approval mechanism. The flaw resides in the approval workflow where the system uses an “exec approver gate” to handle plugin action approvals. In a properly configured environment, approval authority is split so that only designated operators can approve sensitive plugin actions. However, due to improper access control (CWE-863), the system fails to adequately validate whether a user possesses the correct clearance level for the specific action being approved.
The vulnerability allows a Slack user who is authorized only for exec approvals to resolve a plugin approval through the exec approver gate. This means an attacker with limited exec approval permissions can bypass the intended approval splits and approve plugin actions that should remain outside their scope. The technical execution involves manipulating the approval process to circumvent the configuration boundaries that separate operational roles from executive approval requirements.
Because the approval workflow becomes malleable, an unauthorized user can effectively elevate their privileges through legitimate approval processes. The attack requires the attacker to be authenticated with exec approval privileges within the OpenClaw instance. From there, they can manipulate Slack plugin approvals via the API or web interface. The flaw does not change OpenClaw’s trusted-operator model—authenticated Gateway operators, installed plugins, and intentional local execution surfaces remain trusted unless a separate policy, approval, allowlist, sandbox, or auth boundary is crossed. However, when the affected feature is enabled and reachable, it can approve a plugin action outside the operator’s intended approval split. Practical impact depends on the operator’s configuration and whether lower-trust input can reach that path.
DailyCVE Form
Platform: OpenClaw
Version: < 2026.5.12
Vulnerability: Privilege Escalation
Severity: Medium (CVSS 4.3)
Date: 2026-05-29
Prediction: Already patched (2026.5.12)
What Undercode Say
Check OpenClaw version openclaw --version Verify if vulnerable (version < 2026.5.12) if [[ $(openclaw --version | grep -oP '\d+.\d+.\d+') < "2026.5.12" ]]; then echo "Vulnerable to CVE-2026-32906" fi Audit approval logs for anomalous activity grep "plugin approval" /var/log/openclaw/approval.log | grep -v "operator" List users with exec approval permissions openclaw admin list-approvers --type exec Review current approval split configuration openclaw config get approval.split.enabled
Exploit
An attacker with exec approval permissions can exploit this flaw by sending a crafted approval request to the Slack plugin approval endpoint, resolving a plugin action through the exec approver gate without proper authorization checks. The attacker can then approve actions such as system modifications, access changes, or other operations that should remain restricted. Because the vulnerability exists in the API and web interface, it can be triggered remotely over the network with low complexity, requiring only low privileges.
Protection
- Upgrade OpenClaw to version 2026.5.12 or later.
- Restrict exec approval permissions to only trusted users and remove unnecessary approvers.
- Review operator configurations to enforce approval splits.
- Audit plugin approval logs for anomalous activity.
- Keep approval allowlists aligned and review Slack approval actions manually until patched.
- Keep channel and tool allowlists narrow; avoid sharing one Gateway between mutually untrusted users.
- Disable the affected feature when it is not needed.
Impact
Successful exploitation allows an attacker with limited exec approval permissions to bypass intended approval splits and approve plugin actions outside the operator’s configuration. This undermines the principle of least privilege and can lead to unauthorized system modifications, access changes, and potential compromise of the underlying infrastructure. The vulnerability affects all OpenClaw deployments prior to version 2026.5.12 that have the Slack plugin approval feature enabled.
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Sources:
Reported By: github.com
Extra Source Hub:
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