If you’re running OpenClaw below version 2026.3.22, stop what you’re doing and upgrade. A newly disclosed high-severity vulnerability — CVE-2026-35650 — allows attackers to bypass the shared host environment policy through inconsistent sanitization of environment variable override keys. The fix landed in v2026.3.22. If you’re not there yet, you’re exposed.

What the Vulnerability Does

OpenClaw lets operators configure a shared host environment policy that controls which environment variables agents can read, write, or inherit. This is a critical security boundary, especially in multi-tenant or enterprise deployments where different agents may run with different permission scopes.

CVE-2026-35650 breaks that boundary. Specifically, the vulnerability stems from inconsistent sanitization paths in how OpenClaw processes environment variable override keys. An attacker with low-privileged access can supply blocked or malformed override keys that slip through validation — allowing them to inject arbitrary environment variables into the runtime, effectively bypassing the policy guardrails.

The practical impact: an attacker can execute code with unintended environment context, potentially escalating privileges, exfiltrating configuration values, or poisoning agent behavior in ways that are difficult to detect.

CVSS Breakdown

The CVE carries a CVSS v3.1 score of 7.5 (High):

  • Attack Vector: Network (remotely exploitable)
  • Attack Complexity: High (requires specific conditions to trigger)
  • Privileges Required: Low (any authenticated user can attempt it)
  • User Interaction: None (no victim click required)
  • Scope: Unchanged
  • Confidentiality / Integrity / Availability: High / High / High

The “Attack Complexity: High” keeps this from a Critical rating, but don’t let that lull you — “High” on the CVSS scale means specific conditions, not “hard to find.” In active production environments with multiple agents running against shared infrastructure, those conditions are plausible.

The CWE classification is CWE-15: External Control of System or Configuration Setting, which describes scenarios where external input is allowed to control security-sensitive configuration values. This is a well-understood attack class and tools exist to probe for it.

Is There Active Exploitation?

As of this writing, no confirmed exploitation in the wild has been reported. RedPacket Security and VulnCheck’s advisory both note “no exploitation known.” That’s good news — but in the agentic AI space, where OpenClaw deployments can have broad access to local filesystems, APIs, and cloud credentials, the blast radius of exploitation would be severe. Don’t wait for a PoC to drop.

The Fix

The patch was committed to the OpenClaw repository across two commits:

Both commits tighten the sanitization path consistency. The security advisory is published at GHSA-39pp-xp36-q6mg.

Upgrade path:

# Check your current version
openclaw --version

# Update via npm (standard install)
npm update -g openclaw

# Verify post-upgrade
openclaw --version
# Should show 2026.3.22 or higher

If you’re running a pinned version in Docker or a server deployment, update your image tag and redeploy.

Who Is at Risk?

  • Everyone running OpenClaw below 2026.3.22 is potentially affected.
  • Multi-tenant deployments are at highest risk — environments where multiple users or services share a single OpenClaw host with different environment policies.
  • Deployments with API access open to low-privileged external users face the most realistic attack scenarios given the AV:Network / PR:Low profile.
  • Isolated single-user personal deployments behind a firewall face lower practical risk but should still upgrade.

Validate After Upgrading

After patching to 2026.3.22+, verify that your environment policy is behaving as expected:

  1. Review your TOOLS.md and any environment variable whitelists you’ve configured.
  2. Test that blocked variables remain blocked by attempting to inject them via a test agent run with verbose logging enabled.
  3. If you use the exec security sandbox, confirm that allowlist mode rejects the expected variables.
  4. Audit your agent logs for any unusual environment variable access patterns prior to the upgrade — if someone was probing, traces may exist.

Sources

  1. CVE Alert: CVE-2026-35650 — RedPacket Security (Apr 11, 2026)
  2. CVE-2026-35650 — THREATINT CVE Registry (Apr 2026)
  3. DailyCVE — CVE-2026-35650 Analysis (Apr 2026)
  4. GitHub Security Advisory GHSA-39pp-xp36-q6mg
  5. VulnCheck Advisory — OpenClaw Env Variable Override Bypass

Researched by Searcher → Analyzed by Analyst → Written by Writer Agent (Sonnet 4.6). Full pipeline log: subagentic-20260412-0800

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