Listen to this Post
Technical Overview
OpenClaw before version 2026.4.29 contains an incorrect authorization vulnerability (CWE-863) in its browser debug and export routes. The flaw stems from the way the application handles already‑open browser tabs when a user invokes debugging or export functionality.
Under normal operation, OpenClaw enforces a Server‑Side Request Forgery (SSRF) policy that blocks tabs from accessing private‑network resources (e.g., internal IP addresses, localhost, or cloud metadata endpoints). When a tab is first opened, the SSRF policy is evaluated, and if the target is deemed private, the tab is marked as “blocked” and its network access is restricted.
The vulnerability arises in the debug and export routes. These routes accept a tab reference (such as a tab ID or session handle) as input. In affected versions, if a caller provides a reference to a tab that is already open – even one that was previously blocked by the SSRF policy – the debug/export handler reuses that tab without re‑applying the SSRF policy checks.
This means an attacker who can reach these routes (e.g., an authenticated low‑privilege user or a malicious plugin) can supply the identifier of a blocked private‑network tab and force the debug/export endpoint to operate on that tab. The endpoint will then export the tab’s content or inspect its state as if the tab were allowed, completely bypassing the original SSRF block.
The attack chain is simple:
- The attacker causes the browser to open a tab that points to a private‑network resource – the SSRF policy blocks it and marks it as blocked.
- The attacker then calls the debug or export route, passing the blocked tab’s identifier.
- The route accepts the identifier, finds the already‑open tab, and proceeds with the debug/export action without re‑checking the SSRF policy.
- Sensitive internal content (e.g., internal web dashboards, configuration endpoints, or cloud instance metadata) is exported or disclosed to the attacker.
The vulnerability is scoped to the debug/export feature and does not affect the core trusted‑operator model; authenticated Gateway operators, installed plugins, and intentional local execution surfaces remain trusted unless additional policy boundaries are crossed. However, in environments where lower‑trust users or plugins can reach these routes, the impact can be significant.
DailyCVE Form
| Field | Value |
|–|–|
| Platform | OpenClaw |
| Version | < 2026.4.29 |
| Vulnerability | SSRF policy bypass |
| Severity | MEDIUM (CVSS 6.5) |
| Date | 2026-05-29 |
| Prediction | Patched in 2026.4.29 |
What Undercode Say
Analytics
- CVSS v3.1 Vector: `AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N`
– CWE: CWE‑863 – Incorrect Authorization - Attack Complexity: High – requires knowledge of tab identifiers and ability to reach debug/export routes
- Privileges Required: Low – authenticated user or plugin
- User Interaction: Required – the attacker must induce the browser to open a blocked tab
- Confidentiality Impact: High – internal private‑network content can be exfiltrated
- Integrity Impact: Low – limited modification capability
- Availability Impact: None
Bash Commands & Codes
Check OpenClaw version openclaw --version If version < 2026.4.29, upgrade immediately npm install -g [email protected] Alternatively, for Docker-based deployments docker pull openclaw/openclaw:2026.4.29 Disable debug/export routes as a temporary mitigation (if configurable) openclaw config set --feature.browser-debug=false openclaw config set --feature.browser-export=false
Exploit
A successful exploitation requires:
- Access to the debug or export routes – these are typically exposed to authenticated users or plugins.
- Knowledge of a blocked tab’s identifier – the attacker can obtain this by observing browser session data or by brute‑forcing tab IDs (if they are predictable).
- Ability to cause the browser to open a private‑network tab – this can be done by tricking a user into clicking a link that points to an internal IP, or by using an XSS or similar vector if the application is vulnerable.
Once these conditions are met, the attacker sends a request like:POST /api/browser/debug { "tabId": "blocked-tab-123", "action": "export" }The server returns the content of the private‑network resource that was originally blocked, effectively turning the debug/export feature into an SSRF proxy.
No public exploit code has been released, and the attack is considered difficult to execute. However, the technical simplicity of the flaw makes it a viable target for sophisticated attackers.
Protection
- Upgrade to OpenClaw 2026.4.29 or later – this is the first stable patched version.
- Disable the browser debug and export features entirely if they are not required in your environment.
- Restrict access to the debug/export routes using network‑level or application‑level authorization (e.g., only allow trusted admin IPs).
- Close blocked tabs immediately after they are blocked, so they cannot be reused by a later debug/export call.
- Avoid sharing a single OpenClaw Gateway between mutually untrusted users.
- Keep channel and tool allowlists narrow to limit the attack surface.
- Monitor logs for unusual debug/export requests, especially those referencing tab IDs that are not associated with the current user’s session.
Impact
- Confidentiality Breach: Attackers can exfiltrate sensitive data from internal networks, including configuration files, internal dashboards, cloud metadata (e.g., AWS IMDS), and other resources that should be protected by the SSRF policy.
- Bypass of Network Controls: The vulnerability effectively nullifies the SSRF protection for already‑opened blocked tabs, allowing attackers to pivot from the OpenClaw instance into the private network.
- Limited Integrity Impact: While the primary risk is data disclosure, some debug/export actions might allow limited modification of tab state, though this is not the primary attack vector.
- Operational Risk: In multi‑tenant deployments, one tenant could potentially access another tenant’s private resources if they share the same Gateway instance.
- Compliance: Exposure of internal data may lead to violations of data protection regulations (e.g., GDPR, HIPAA) if sensitive personal or health information is disclosed.
The practical impact is highly dependent on the operator’s configuration and whether lower‑trust input can reach the affected routes. In well‑isolated environments with strict access controls, the risk is minimal; in shared or public‑facing deployments, the risk is elevated.
🎯Let’s Practice Exploiting & Learn Patching For Free:
🎓 Live Courses & Certifications:
Join Undercode Academy for Verified Certifications
🚀 Request a Custom Project:
Secure, high-velocity infrastructure and disruptive technological engineering. Contact our engineering team for high-tier development and proprietary systems:
[email protected]
💎 Smart Architecture | 🛡️ Secure by Design | ⭐ Trusted by Thousands
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
