Vulnerability in openclaw (CVE-2026-3690)
Summary
Vulnerability in openclaw (CVE-2026-3690). Confidential information can be exposed externally. Exploitable via poc.py. Mitigation: upgrade to 2026.2.19 or later.
Original description
The description as published by the source.
ZDI-CAN-29311: OpenClaw Canvas Authentication Bypass Vulnerability
-- ABSTRACT -------------------------------------
Trend Micro's Zero Day Initiative has identified a vulnerability affecting the following products:
OpenClaw - OpenClaw
-- VULNERABILITY DETAILS ------------------------
- Version tested: openclaw 2026.2.17
- Platform tested: macOS 26.3
Analysis
Description
The OpenClaw gateway's authorizeCanvasRequest() function implements an IP-based authentication fallback for canvas endpoints (/__openclaw__/a2ui/, /__openclaw__/canvas/, /__openclaw__/ws). When a WebSocket client authenticates from a private IP address, ALL subsequent HTTP requests from that same IP are granted canvas access without requiring their own authentication token.
In environments where multiple clients share a single IP address ��� corporate NAT, VPN concentrators, Kubernetes clusters, Docker host-mode networking ��� an unauthenticated attacker on the same network is granted full canvas access by virtue of sharing an IP with a legitimate authenticated client.
Root Cause
Three functions in src/gateway/server-http.ts create this vulnerability:
1. IP-matching function (line ~100)
function hasAuthorizedWsClientForIp(clients: Set, clientIp: string): boolean {
for (const client of clients) {
if (client.clientIp && client.clientIp === clientIp) {
return true;
}
}
return false;
}
This function checks if ANY connected WebSocket cl…
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-3690 has been found in openclaw.
Attackers can target a specific entry point like poc.py over the network to misuse the product.
Confidential information can be exposed externally.
What to do: upgrade openclaw to 2026.2.19 or later.
If unsure, ask your IT team or search "openclaw CVE-2026-3690" on the vendor's site.
CVE-2026-3690 (openclaw) — CWE-291
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: poc.py / Authorization / c45f3c5b004c8d63dc0e282e2176f8c9355d24f1
Patched: 2026.2.19 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-291) exists in openclaw. Attackers reach the vulnerable code path via poc.py without authentication.
Check the vendor advisory for the affected versions of openclaw. Attack surface: poc.py / Authorization / c45f3c5b004c8d63dc0e282e2176f8c9355d24f1.
Severity: ?. Confidential information can be exposed externally.
Update to 2026.2.19.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'openclaw' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'openclaw' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
openclawを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade openclaw to 2026.2.19ステージング環境で 2026.2.19 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- package github.com
- web github.com
- web github.com