CVE-2026-41329 is a CVSS 9.9 Critical sandbox bypass vulnerability in OpenClaw before version 2026.3.31. This guide walks you through everything you need to do: check if you’re affected, patch your installation, and verify the fix.

Do this now. No-user-interaction-required, network-accessible, low-complexity exploits like this one have historically seen fast exploitation timelines after public disclosure.

Step 1: Check Your Current Version

Before anything else, confirm which version of OpenClaw you’re running.

openclaw --version

Vulnerable: Any version below 2026.3.31

Safe: 2026.3.31 or higher

If you’re already on 2026.3.31 or later — you’re done. Verify the commit hash if you want extra confidence:

openclaw --version --verbose
# Look for: a30214a624946fc5c85c9558a27c1580172374fd or later

Step 2: Back Up Your Configuration

Before upgrading, back up your current OpenClaw configuration so you can restore it if anything goes wrong.

# Default config location
cp ~/.openclaw/config.yml ~/.openclaw/config.yml.backup-$(date +%Y%m%d)

# If you have a custom workspace
cp -r /path/to/your/workspace/AGENTS.md /path/to/your/workspace/AGENTS.md.bak

Also note any custom skills or installed extensions:

openclaw skills list

Step 3: Upgrade OpenClaw

Choose the method that matches how you installed OpenClaw:

If installed via npm (most common):

npm update -g openclaw

Or to install a specific version:

npm install -g [email protected]

If installed via npm with a pinned version in package.json:

# Update package.json manually to >= 2026.3.31, then:
npm install

If running from source (git clone):

cd /path/to/openclaw
git fetch origin
git checkout v2026.3.31
npm install
npm run build

If using a container image:

Pull the updated image:

docker pull openclaw/openclaw:2026.3.31
# or
docker pull openclaw/openclaw:latest

Update your docker-compose.yml or systemd service to use the new tag.

If running on a Solode Neo or embedded device:

The Solode Neo OTA update system should apply the patch automatically. To force an immediate check:

openclaw update check
openclaw update apply

Or via the Telegram/WhatsApp interface, send: update openclaw

Step 4: Verify the Upgrade

After upgrading, confirm the new version is active:

openclaw --version

Expected output should show 2026.3.31 or higher.

Also verify the fix commit is present if you’re running from source:

git log --oneline | grep a30214a
# Should show: a30214a fix: heartbeat context validation — prevent senderIsOwner bypass

Step 5: Review Your Heartbeat Configuration

The vulnerability lives in how OpenClaw handles heartbeat context inheritance and the senderIsOwner parameter. After patching, do a quick review of your configuration to understand your exposure.

grep -r "senderIsOwner" ~/.openclaw/
grep -r "heartbeat" ~/.openclaw/config.yml

If you see any custom overrides for senderIsOwner behavior in your config, review whether they’re still needed or if they represent configuration debt you should clean up.

Check agent logs for anomalies:

Look at recent agent activity logs for any unusual privilege escalation patterns before you patched:

openclaw logs --last 24h | grep -i "privilege\|escalat\|sandbox\|owner"

If you see unusual entries, especially activity you didn’t initiate, take that seriously. Capture the logs and investigate further before resuming normal agent operations.

Step 6: Network-Level Hardening (If Immediate Upgrade Isn’t Possible)

If you’re running a managed environment where an immediate upgrade requires change-management approval, implement these temporary mitigations while the patch is scheduled:

1. Restrict OpenClaw port access:

# Block inbound connections to OpenClaw's default port from untrusted networks
sudo ufw deny from any to any port 3141  # adjust port to your config
sudo ufw allow from 192.168.1.0/24 to any port 3141  # allow local network only

2. Disable heartbeat polling from external sources:

In ~/.openclaw/config.yml:

gateway:
  heartbeat:
    allowExternal: false  # disable external heartbeat triggers

Restart OpenClaw after this change: openclaw restart

3. Enable audit logging:

logging:
  level: debug
  auditHeartbeat: true

Note: These are mitigations, not fixes. Patch as soon as possible.

Confirming the GitHub Security Advisory

The official advisory for this vulnerability is GHSA-g5cg-8x5w-7jpm. Review it directly:

Summary Checklist

  • Ran openclaw --version — confirmed version is below 2026.3.31
  • Backed up config and workspace files
  • Upgraded to 2026.3.31 using the appropriate method above
  • Verified openclaw --version now shows 2026.3.31+
  • Reviewed heartbeat configuration for custom senderIsOwner overrides
  • Checked recent logs for anomalous activity
  • (Optional) Applied network hardening if in a managed change-control environment

Sources

  1. CVE-2026-41329 Disclosure — TheHackerWire
  2. GitHub Security Advisory GHSA-g5cg-8x5w-7jpm
  3. Tenable CVE Database

Researched by Searcher → Analyzed by Analyst → Written by Writer Agent (Sonnet 4.6). Full pipeline log: subagentic-20260421-0800

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