GHSA-855V-HQ7W-JMJW

Vulnerability from github – Published: 2026-07-24 17:00 – Updated: 2026-07-24 17:00
VLAI
Summary
Open WebUI: Realtime endpoints accept Redis-revoked JWTs after signout/backchannel logout
Details

Summary

With Redis configured, Open WebUI supports JWT revocation: POST /api/v1/auths/signout (per-token jti) and OIDC back-channel logout (per-user revoked_at) record revocations in Redis, and HTTP auth (get_current_user) rejects revoked tokens with 401. The realtime authentication surfaces do not perform this check: Socket.IO connect / user-join / join-channels / join-note and the terminal websocket first-message auth validate tokens with decode_token() only (signature + expiry). A JWT revoked by sign-out or back-channel logout therefore continues to authenticate new realtime connections, even though the same token is rejected on HTTP.

Affected component

  • backend/open_webui/socket/main.py — Socket.IO connect, user-join, join-channels, join-note
  • backend/open_webui/routers/terminals.py — terminal websocket first-message auth
  • backend/open_webui/utils/auth.py — the revocation check was applied to HTTP only

Root cause

HTTP auth enforces revocation:

# utils/auth.py — get_current_user
if data.get('jti') and not await is_valid_token(request, data):
    raise HTTPException(status_code=401, detail='Invalid token')

Realtime auth calls decode_token() only, which verifies signature + expiry but never consults the Redis revocation keys ({prefix}:auth:token:{jti}:revoked, {prefix}:auth:user:{id}:revoked_at):

# socket/main.py — connect / user-join / join-channels / join-note
data = decode_token(auth['token'])
# routers/terminals.py — _resolve_authenticated_connection
data = decode_token(token)

Impact

A JWT revoked by user sign-out or OIDC back-channel logout still authenticates new realtime connections. A stolen token therefore retains realtime access after the victim signs out or the IdP performs back-channel logout — the very remediation for a compromised token. The token can populate SESSION_POOL as the victim, join their user/channel/note rooms (receiving realtime channel messages, collaborative-note updates and presence), drive socket-level collaboration as the victim, and pass terminal websocket authentication when terminal servers are configured. HTTP remains correctly protected (401), so REST data and state-changing REST endpoints are not reachable with the revoked token.

Proof of Concept

Reporter PoC on a Redis-backed deployment (v0.9.6 and main): after POST /api/v1/auths/signout, HTTP returns 401 for the token while a Socket.IO user-join with the same token still authenticates, and the terminal WS reaches terminal-server lookup rather than rejecting it as Invalid token.

Fix

Apply the revocation check on the realtime paths. The logic is factored into is_token_revoked(redis, decoded) (covering per-token jti and per-user revoked_at); the Socket.IO handlers and the terminal WS reject tokens that fail it, using the main app Redis where revocations are stored. HTTP is_valid_token delegates to the same helper, so HTTP behaviour is unchanged.

Affected / Patched

  • Affected: >= 0.9.0, < 0.10.0, and only when Redis is configured (without Redis, per-token revocation is not supported and sign-out does not invalidate JWTs by design).
  • Patched: v0.10.0. The revocation check (is_valid_token, covering per-token jti and per-user revoked_at) is applied on Socket.IO connect / user-join / join-channels / join-note and the terminal websocket first-message auth, using the main app Redis where revocations are stored. HTTP is_valid_token delegates to the same logic, so HTTP behaviour is unchanged.
Severity
7.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "open-webui"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.9.0"
            },
            {
              "fixed": "0.10.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-59219"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-613"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-24T17:00:11Z",
    "nvd_published_at": "2026-07-09T17:17:02Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\nWith Redis configured, Open WebUI supports JWT revocation: `POST /api/v1/auths/signout` (per-token `jti`) and OIDC back-channel logout (per-user `revoked_at`) record revocations in Redis, and HTTP auth (`get_current_user`) rejects revoked tokens with 401. The realtime authentication surfaces do not perform this check: Socket.IO connect / user-join / join-channels / join-note and the terminal websocket first-message auth validate tokens with `decode_token()` only (signature + expiry). A JWT revoked by sign-out or back-channel logout therefore continues to authenticate new realtime connections, even though the same token is rejected on HTTP.\n\n## Affected component\n\n- `backend/open_webui/socket/main.py` \u2014 Socket.IO `connect`, `user-join`, `join-channels`, `join-note`\n- `backend/open_webui/routers/terminals.py` \u2014 terminal websocket first-message auth\n- `backend/open_webui/utils/auth.py` \u2014 the revocation check was applied to HTTP only\n\n## Root cause\n\nHTTP auth enforces revocation:\n\n```python\n# utils/auth.py \u2014 get_current_user\nif data.get(\u0027jti\u0027) and not await is_valid_token(request, data):\n    raise HTTPException(status_code=401, detail=\u0027Invalid token\u0027)\n```\n\nRealtime auth calls `decode_token()` only, which verifies signature + expiry but never consults the Redis revocation keys (`{prefix}:auth:token:{jti}:revoked`, `{prefix}:auth:user:{id}:revoked_at`):\n\n```python\n# socket/main.py \u2014 connect / user-join / join-channels / join-note\ndata = decode_token(auth[\u0027token\u0027])\n# routers/terminals.py \u2014 _resolve_authenticated_connection\ndata = decode_token(token)\n```\n\n## Impact\n\nA JWT revoked by user sign-out or OIDC back-channel logout still authenticates new realtime connections. A stolen token therefore retains realtime access after the victim signs out or the IdP performs back-channel logout \u2014 the very remediation for a compromised token. The token can populate `SESSION_POOL` as the victim, join their user/channel/note rooms (receiving realtime channel messages, collaborative-note updates and presence), drive socket-level collaboration as the victim, and pass terminal websocket authentication when terminal servers are configured. HTTP remains correctly protected (401), so REST data and state-changing REST endpoints are not reachable with the revoked token.\n\n## Proof of Concept\n\nReporter PoC on a Redis-backed deployment (v0.9.6 and main): after `POST /api/v1/auths/signout`, HTTP returns 401 for the token while a Socket.IO user-join with the same token still authenticates, and the terminal WS reaches terminal-server lookup rather than rejecting it as `Invalid token`.\n\n## Fix\n\nApply the revocation check on the realtime paths. The logic is factored into `is_token_revoked(redis, decoded)` (covering per-token `jti` and per-user `revoked_at`); the Socket.IO handlers and the terminal WS reject tokens that fail it, using the main app Redis where revocations are stored. HTTP `is_valid_token` delegates to the same helper, so HTTP behaviour is unchanged.\n\n## Affected / Patched\n\n- Affected: `\u003e= 0.9.0, \u003c 0.10.0`, and only when Redis is configured (without Redis, per-token revocation is not supported and sign-out does not invalidate JWTs by design).\n- Patched: v0.10.0. The revocation check (`is_valid_token`, covering per-token `jti` and per-user `revoked_at`) is applied on Socket.IO connect / user-join / join-channels / join-note and the terminal websocket first-message auth, using the main app Redis where revocations are stored. HTTP `is_valid_token` delegates to the same logic, so HTTP behaviour is unchanged.",
  "id": "GHSA-855v-hq7w-jmjw",
  "modified": "2026-07-24T17:00:11Z",
  "published": "2026-07-24T17:00:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-855v-hq7w-jmjw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59219"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/commit/33b91bd8ae8a100a5a306c91441a7d0b422c4cde"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/open-webui/open-webui"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open-webui/open-webui/releases/tag/v0.10.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Open WebUI: Realtime endpoints accept Redis-revoked JWTs after signout/backchannel logout"
}



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