CVE-2026-100589: OpenClaw sandbox bypass in browser tool

CVE-2026-100589 · Severity: high · CVSS 8.3 · Published 2026-09-26

OpenClaw is a tool that allows agents to interact with browsers and other systems. Versions before 2026.7.1 contain a sandbox bypass flaw in the browser tool that allows sandboxed sessions to access browser operations on paired nodes, even when host control is explicitly disabled. An attacker who can control a sandboxed agent's input can inspect or manipulate the connected browser profile, potentially accessing sensitive authenticated sessions and data.

Technologies: Openclaw. Vendors: Openclaw.

Quick answers

Is CVE-2026-100589 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-100589 being exploited in the wild.
How severe is CVE-2026-100589?
High severity, with a CVSS score of 8.3, published 26 September 2026.
Which products and versions are affected?
Openclaw before 2026.7.1.
Is there a fix for CVE-2026-100589?
A patch was published on 2026-07-01: Fixed in version 2026.7.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-100589 attacked?
It is attacked over the network.
Am I affected by CVE-2026-100589?
Check whether you run Openclaw at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an authorization bypass (CWE-863) in the browser tool component where sandboxed sessions can reach host browser actions despite allowHostControl=false configuration. The attack requires low privileges (the ability to steer sandboxed agent input) and network access, with no user interaction needed. A successful exploit allows the attacker to access browser operations and authenticated state on paired nodes, bypassing the sandbox boundary intentionally set by the operator.

Affected products

  • OpenClaw OpenClaw before 2026.7.1

Timeline

  • 2026-09-11: disclosed: Security advisory published on GitHub
  • 2026-07-01: patched: Fixed in version 2026.7.1

References

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