CVE-2026-35634
mediumpriority · track · 0OT risk · elevatedEPSS 0.001 · 3 %ileDEEUUSEPSS · scored 2026-10-27
OpenClaw before 2026.3.23 contains an authentication bypass vulnerability in the Canvas gateway where authorizeCanvasRequest() unconditionally allows local-direct requests without validating bearer tokens or canvas capabilities. Attackers can send unauthenticated loopback HTTP and WebSocket requests to Canvas routes to bypass authentication and gain unauthorized access.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.2–5.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (5)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-0856OpenClaw: Mehrere SchwachstellenDeutsch2026-03-24csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in OpenClaw ausnutzen, um beliebigen Code auszuführen, erweiterte Berechtigungen – sogar Administratorrechte – zu erlangen, Daten zu manipulieren, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand herbeizuführen oder andere, nicht näher spezifizierte Angriffe durchzuführen.
- GHSA-6mqc-jqh6-x8fcOpenClaw: Gateway Canvas local-direct requests bypass Canvas HTTP and WebSocket authentication2026-03-26ghsa · osvUS
## Summary Before `v2026.3.23`, Canvas and A2UI loopback requests could bypass Canvas bearer-or-capability authentication because `authorizeCanvasRequest(...)` treated `isLocalDirectRequest(...)` as an unconditional allow path. ## Affected Packages / Versions - Package: `openclaw` (npm) - Affected: `< 2026.3.23` - Fixed: `>= 2026.3.23` - Latest released tag checked: `v2026.3.23-2` (`630f1479c44f78484dfa21bb407cbe6f171dac87`) - Latest published npm version checked: `2026.3.23-2` ## Root Cause The vulnerable logic lived in `src/gateway/server/http-auth.ts`. `authorizeCanvasRequest(...)` returned `{ ok: true }` for local-direct requests before checking bearer authentication or an active node canvas capability, which meant unauthenticated loopback Canvas HTTP and WebSocket requests could succeed. ## Fix Commit(s) - `d5dc6b6573ae489bc7e5651090f4767b93537c9e` — `fix(gateway): require auth for canvas routes` ## Release Status The fix commit is contained in released tags `v2026.3.23` and `v2026.3.23-2`. The latest shipped tag and npm release both include the fix. ## Code-Level Confirmation - `src/gateway/server/http-auth.ts` no longer contains the local-direct early return in `authorizeCanvasRequest(...)`. - `src/gateway/server.canvas-auth.test.ts` adds the regression test `denies canvas HTTP/WS on loopback without bearer or capability by default`. Thanks @smaeljaish771 for reporting.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (13)
External citations — patches, advisories, analysis.
- https://github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87cnnvd
- https://github.com/openclaw/openclaw/commit/d5dc6b6573ae489bc7e5651090f4767b93537c9ecnnvd
- https://github.com/openclaw/openclaw/releasesPatchcnnvd
- https://github.com/openclaw/openclaw/security/advisories/GHSA-6mqc-jqh6-x8fccnnvd
- https://www.vulncheck.com/advisories/openclaw-authentication-bypass-via-local-direct-requests-in-canvas-gatewaycnnvd
- https://github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87enisa_euvd
- https://github.com/openclaw/openclaw/commit/d5dc6b6573ae489bc7e5651090f4767b93537c9eenisa_euvd
- https://github.com/openclaw/openclaw/security/advisories/GHSA-6mqc-jqh6-x8fcenisa_euvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan