OpenClaw: Gateway Canvas local-direct requests bypass Canvas HTTP and WebSocket authentication

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-35634: 0.14% estimated exploitation activity in the next 30 days; percentile 3.46 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

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…

Published by the source

26 Mar 2026, 18:59 UTC

Last modified by the source

10 Apr 2026, 20:42 UTC

Source last checked

26 Oct 2026, 12:48 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-6mqc-jqh6-x8fc

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-6mqc-jqh6-x8fc

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# Patch Next advisory brief: CVE-2026-35634

Advisory: OpenClaw: Gateway Canvas local-direct requests bypass Canvas HTTP and WebSocket authentication
IDs: CVE-2026-35634, GHSA-6mqc-jqh6-x8fc
Record: https://patchnext.com/advisories/cve-2026-35634 (revision 3, source checked 26 Oct 2026, 12:48 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: openclaw 2026.3.23. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm openclaw: affected < 2026.3.23; fixed in 2026.3.23

## Suggested inspection (read-only)
- `npm ls openclaw --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on openclaw.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-6mqc-jqh6-x8fc (OSV record GHSA-6mqc-jqh6-x8fc lists affected ranges: npm openclaw >=0 <2026.3.23 (fixed))
- Verified: https://github.com/advisories/GHSA-6mqc-jqh6-x8fc (GitHub-reviewed advisory GHSA-6mqc-jqh6-x8fc lists affected ranges: npm openclaw >=0 <2026.3.23)

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