CVE-2026-44109: OpenClaw: Feishu webhook and card-action validation now fail closed

Summary

Feishu webhook mode accepted missing encryptKey configuration as valid and blank card-action callback tokens as usable lifecycle tokens. Together, those fail-open paths could allow unauthenticated webhook or card-action traffic to reach command dispatch in affected deployments.

Impact

A deployment using Feishu webhook mode without a configured encryptKey, or handling malformed card-action callbacks with blank callback tokens, could fail open instead of rejecting the request. Severity remains critical because affected webhook deployments expose a network-triggered path into OpenClaw command handling without the expected Feishu signature or replay protection.

Affected versions

• Affected: < 2026.4.15
• Patched: 2026.4.15

Fix

OpenClaw 2026.4.15 makes Feishu webhook and card-action validation fail closed. Webhook mode now refuses to start without an encryptKey, missing signing configuration returns invalid instead of valid, invalid signatures return 401, and blank card-action callback tokens are rejected before dispatch.

Verified in v2026.4.15:

• extensions/feishu/src/monitor.transport.ts returns invalid when encryptKey is missing, refuses webhook mode without encryptKey, and rejects invalid signatures before JSON handling.
• extensions/feishu/src/card-action.ts rejects blank callback tokens in the card-action lifecycle guard.
• extensions/feishu/src/monitor.webhook-security.test.ts covers missing-encryptKey startup and transport rejection.
• extensions/feishu/src/monitor.card-action.lifecycle.test.ts covers malformed blank-token card actions being dropped before handler dispatch.

Fix commit included in v2026.4.15 and absent from v2026.4.14:

• c8003f1b33ed2924be5f62131bd28742c5a41aae via PR #66707

Thanks to @dhyabi2 for reporting this issue.