CVE-2026-62212 in OpenClaw
Summary
by MITRE • 07/17/2026
OpenClaw before 2026.5.28 contains a race condition in the MS Teams safeFetch DNS rebinding check. When the affected feature is enabled and reachable, a lower-trust caller or configured input path could win a timing window between the DNS validation check and use, allowing actions that should have required a stronger authorization or policy check. Practical impact depends on the operator's configuration and whether lower-trust input can reach that path.
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Analysis
by VulDB Data Team • 07/17/2026
The OpenClaw vulnerability identified in versions prior to 2026.5.28 represents a critical race condition within the Microsoft Teams safeFetch DNS rebinding protection mechanism. This flaw exists specifically within the validation process that occurs before DNS resolution is permitted, creating a temporal window where malicious actors can exploit the system's timing dependencies. The vulnerability manifests when the safeFetch feature is enabled and accessible, establishing a scenario where unauthorized entities can manipulate the sequence of operations to bypass intended security controls.
The technical implementation of this race condition stems from insufficient synchronization between the DNS validation check and subsequent resource access operations. During normal operation, the system should validate DNS responses against predefined policies before granting access to requested resources. However, the flaw allows for a race condition where a lower-trust entity or malicious input path can execute faster than the validation process, effectively winning the timing window between when the DNS check occurs and when the validated response is actually used. This temporal inconsistency creates an exploitable gap in the security model that undermines the intended authorization boundaries.
From an operational impact perspective, the vulnerability's practical consequences depend heavily on the specific operator configuration and network topology. When properly configured with appropriate trust boundaries, the risk may be mitigated through network segmentation and access controls. However, if lower-trust input paths can reach the vulnerable endpoint, attackers could potentially bypass DNS rebinding protections that are designed to prevent malicious domain resolution attacks. The attack surface expands when considering that DNS rebinding techniques often involve exploiting browser behaviors and network timing characteristics to gain unauthorized access to internal systems or resources.
The vulnerability aligns with common weakness enumerations such as CWE-362, which describes race conditions in security-critical operations, and maps to ATT&CK technique T1071.004 for DNS tunneling and related network protocol abuse. Organizations implementing OpenClaw solutions should consider both the immediate remediation through updating to version 2026.5.28 or later, as well as broader network security measures that can limit exposure to potential attackers who might attempt to exploit this timing window. The fix implemented in the updated version addresses the synchronization issue by ensuring that DNS validation and resource access operations occur in a properly ordered sequence, preventing the race condition from being exploitable.
Security teams should also consider implementing additional monitoring for anomalous DNS resolution patterns or unusual access sequences that might indicate exploitation attempts. The vulnerability demonstrates how seemingly minor timing issues in security-critical code paths can create significant operational risks when combined with existing network trust models and access controls. Organizations using Microsoft Teams integration features should conduct thorough security assessments of their configurations to identify potential exposure points where this race condition could be leveraged by attackers with access to lower-trust network segments or input paths.