Listen to this Post
How CVE-2026-53809 Works
OpenClaw before version 2026.4.25 contains a policy bypass vulnerability in its embedded runner policy. The flaw arises when the system evaluates access requests that use provider aliases. Instead of resolving these aliases to their canonical (true) provider identities before making an access decision, the policy comparison is performed directly against the alias itself.
This creates a dangerous ambiguity. An attacker can craft a request using a provider alias that appears to belong to an authorized provider with limited permissions. However, because the system does not map the alias back to the correct canonical identity, the policy engine may incorrectly grant access based on the alias’s perceived privileges rather than the actual identity of the requesting provider.
The core of the vulnerability lies in the policy evaluation logic’s failure to perform proper alias resolution before authorization checks. When the embedded runner receives a request, it checks the policy against the provided alias. If that alias is associated with a provider that has broader access in the policy database, the request is approved. In reality, the requester might be a different provider entirely, using the alias to impersonate a more privileged one.
This bypass allows attackers to select and access bundled tools that should be outside their intended provider policy restrictions. The vulnerability is only exploitable when the affected feature is enabled and reachable. Its practical impact is highly dependent on the operator’s specific configuration and whether lower-trust inputs can reach the vulnerable path. The issue is classified under CWE-863 (Incorrect Authorization) and has a CVSS v4 base score of 4.8, with a MEDIUM severity rating. The fix, implemented in version 2026.4.25, corrects the alias resolution process to properly map aliases to canonical identities before any access comparisons are made.
DailyCVE Form:
Platform: ……. OpenClaw
Version: …….. < 2026.4.25
Vulnerability :…… Provider Alias Confusion
Severity: ……. MEDIUM (CVSS 4.8)
date: ………. 2026-06-11
Prediction: …… 2026-04-25
What Undercode Say:
Analytics:
The vulnerability resides in the policy evaluation engine for the embedded runner. The following conceptual code snippet illustrates the flawed logic:
Vulnerable logic (pre-2026.4.25) def check_access(request, policy): provider_alias = request.get_provider_alias() Directly compares policy against the alias without resolution if policy.has_permission(provider_alias, request.tool): return True return False
The corrected logic (patched in 2026.4.25) resolves the alias to its canonical identity first:
Patched logic (2026.4.25 and later) def check_access(request, policy): provider_alias = request.get_provider_alias() canonical_id = resolve_to_canonical(provider_alias) Critical step added if policy.has_permission(canonical_id, request.tool): return True return False
Bash Command to Check Version:
Check OpenClaw version openclaw --version or if installed via npm npm list openclaw
Exploit:
An attacker could exploit this by sending a request to the embedded runner with a provider alias that is mapped in the policy to a more privileged identity. For example, if the policy grants `ProviderA` access to a sensitive tool, but the attacker’s actual identity is ProviderB, they could set their alias to ProviderA. The vulnerable system would then compare the policy against the alias `ProviderA` and grant access to the tool, effectively allowing `ProviderB` to impersonate ProviderA.
Protection:
- Patch Immediately: Upgrade to OpenClaw version 2026.4.25 or later, which contains the fix.
- Disable the Feature: If the affected embedded runner policy feature is not required, disable it entirely until the patch can be applied.
- Narrow Allowlists: Keep channel and tool allowlists as narrow as possible to reduce the potential impact of a successful bypass.
- Avoid Untrusted Sharing: Do not share a single Gateway instance between mutually untrusted users.
- Monitor for Anomalies: Implement monitoring for unusual access patterns, especially around tool access requests that utilize aliases.
Impact:
Successful exploitation allows an attacker to bypass intended provider policy restrictions. This can lead to unauthorized access to bundled tools that should be restricted. The attacker may be able to escalate privileges, move laterally within the system, and potentially gain access to sensitive data or execute unauthorized operations. The practical impact is configuration-dependent but can be severe in environments where strict access controls are essential.
🎯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
