Skip to content
Patch Next
Sign inAdd to your agent

← Actionable
High, CVSS 7.1amended

@grackle-ai/server has Missing WebSocket Origin Header Validation

GHSA-w3hv-x4fp-6h6j

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (@grackle-ai/server 0.70.3), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

Add to your agent

Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N · score source
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Impact The WebSocket upgrade handler in the server validates authentication (API key token or session cookie) but does not check the Origin header. A malicious webpage on a different origin could initiate a WebSocket connection to ws://localhost:3000/ws if it can leverage the user's session cookie (which is SameSite=Lax, allowing top-level navigations). This enables cross-origin WebSocket hijacking — if a user visits a malicious site while a Grackle session is active, the attacker's page could open a WebSocket and subscribe to real-time events (session output, task updates, environment state). Affected code: - packages/server/src/ws-bridge.ts:80-91 — connection handler accepts WebSocket upgrades without checking req.headers.origin Patches Fix: Validate req.headers.origin against an allowlist before accepting connections: Workarounds Ensure the Grackle server is only accessible on 127.0.0.1 (the default). Do not use --allow-network in untrusted network environments. Resources -…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-w3hv-x4fp-6h6j

  2. Revision 2 · amended ·

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

  3. Revision 1 · created ·

    Published from osv record GHSA-w3hv-x4fp-6h6j

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: GHSA-w3hv-x4fp-6h6j

Advisory: @grackle-ai/server has Missing WebSocket Origin Header Validation
IDs: GHSA-w3hv-x4fp-6h6j
Record: https://patchnext.com/advisories/ghsa-w3hv-x4fp-6h6j (revision 3, source checked 26 Oct 2026, 12:46 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @grackle-ai/server 0.70.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @grackle-ai/server: affected <= 0.70.2; fixed in 0.70.3

## Suggested inspection (read-only)
- `npm ls @grackle-ai/server --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 @grackle-ai/server.
- 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-w3hv-x4fp-6h6j (OSV record GHSA-w3hv-x4fp-6h6j lists affected ranges: npm @grackle-ai/server >=0 <0.70.3 (fixed))
- Verified: https://github.com/advisories/GHSA-w3hv-x4fp-6h6j (GitHub-reviewed advisory GHSA-w3hv-x4fp-6h6j lists affected ranges: npm @grackle-ai/server >=0 <=0.70.2)

Commands are suggestions: review each one before running it.

Loading voting…