Most recent entries from all

bdu:2026-09668

2026-10-03T01:39:15.373506+00:00

bdu:2026-09668

EUVD-2026-319412

2026-10-03T01:39:15.373541+00:00

EUVD-2026-319412

fkie_cve-2026-44552

2026-10-03T01:39:15.373572+00:00

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the tool_servers and terminal_servers keys in utils/tools.py do use a prefix. When two or more Open WebUI instances share a Redis database (a supported and documented deployment pattern, e.g., for multi-region deployments, blue-green setups, or cluster topologies), the unprefixed keys collide. An admin on Instance A writing to tool_servers overwrites the value read by Instance B — causing Instance B's users to receive Instance A's tool server configuration. This vulnerability is fixed in 0.9.0.

GHSA-3x8w-4f7p-xxc2 — Open WebUI: Redis Cache Keys tool_servers and terminal_servers Missing Instance Prefix Enable Cross-Instance Cache Pois…

2026-10-03T01:39:15.373611+00:00

Affected: PyPI: open-webui

# Redis Cache Keys tool_servers and terminal_servers Missing Instance Prefix Enable Cross-Instance Cache Poisoning

## Affected Component

Tool server and terminal server Redis cache: - `backend/open_webui/utils/tools.py` (line 841, tool_servers SET) - `backend/open_webui/utils/tools.py` (line 850, tool_servers GET) - `backend/open_webui/utils/tools.py` (line 976, terminal_servers SET) - `backend/open_webui/utils/tools.py` (line 986, terminal_servers GET)

## Affected Versions

Current main branch (commit `6fdd19bf1`) and likely all versions since the tool server / terminal server Redis cache was introduced.

## Description

Open WebUI uses a `REDIS_KEY_PREFIX` (default `open-webui`) to namespace Redis keys, allowing multiple instances to safely share a single Redis backend. Every Redis key in the codebase uses this prefix — except the `tool_servers` and `terminal_servers` keys in `utils/tools.py`, which use bare key names.

When two or more Open WebUI instances share a Redis database (a supported and documented deployment pattern, e.g., for multi-region deployments, blue-green setups, or cluster topologies), the unprefixed keys collide. An admin on Instance A writing to `tool_servers` overwrites the value read by Instance B — causing Instance B's users to receive Instance A's tool server configuration.

```python # utils/tools.py — unprefixed keys (problem) await request.app.state.redis.set('tool_servers', ...) # line 841 json.loads(await request.app.state.redis.get(…

PYSEC-2026-2696 — Open WebUI: Redis Cache Keys tool_servers and terminal_servers Missing Instance Prefix Enable Cross-Instance Cache Pois…