open-webui/backend/open_webui/utils
Classic298 dc4924b66e
Enforce per-model access on arena fallback before bypass_filter dispatch (#26046)
generate_chat_completion() checks model access on line 200 only when bypass_filter is
False. When an arena model reaches this function without a pre-resolved selected_model_id,
which is the task and background path (the /api/v1/tasks/* endpoints call
generate_chat_completion directly rather than through process_chat_payload), the fallback
resolves the arena to an underlying model and recurses with bypass_filter=True, so the
resolved model's access check is skipped. An authenticated user with access to an arena
could therefore reach a model they are denied directly, and for the default or exclude
arena, whose candidate pool is every non-arena model, any model on the instance (CWE-862).
The normal chat path resolves the arena in process_chat_payload before this function, so its
resolved model is checked on line 200; the task path was not, which is the inconsistency.

Enforce check_model_access() on the resolved model in the fallback, before the
bypass_filter=True recursion, mirroring the normal-path check. Admins and already-bypassed
recursive calls are unaffected, and legitimate arena use of accessible models is unchanged.

Co-authored-by: rexpository <30176934+rexpository@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-16 22:45:42 +02:00
..
access_control Gate scheduled automations and fail closed on per-model access for non-user roles (#26047) 2026-06-16 22:45:27 +02:00
images refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
mcp chore: format 2026-06-01 13:56:55 -07:00
telemetry refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
actions.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
anthropic.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
asgi_middleware.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
audit.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
auth.py chore: format 2026-06-01 13:56:55 -07:00
automations.py Gate scheduled automations and fail closed on per-model access for non-user roles (#26047) 2026-06-16 22:45:27 +02:00
calendar.py feat: calendar 2026-04-19 19:15:05 +09:00
channels.py refac 2026-03-17 17:58:01 -05:00
chat.py Enforce per-model access on arena fallback before bypass_filter dispatch (#26046) 2026-06-16 22:45:42 +02:00
code_interpreter.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
embeddings.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
files.py chore: format 2026-06-01 13:56:55 -07:00
filter.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
groups.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
headers.py refac 2026-06-13 02:13:51 +01:00
logger.py chore: format 2026-06-01 13:56:55 -07:00
middleware.py refac 2026-06-05 16:58:16 -04:00
misc.py chore: format 2026-06-01 13:56:55 -07:00
models.py refac 2026-06-01 12:27:08 -07:00
oauth.py chore: format 2026-06-01 13:56:55 -07:00
payload.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
pdf_generator.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
plugin.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
rate_limit.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
redis.py chore: format 2026-06-01 13:56:55 -07:00
response.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
sanitize.py refac 2026-03-17 17:58:01 -05:00
security_headers.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
session_pool.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
task.py refac: modernize type annotations (PEP 604 / PEP 585) 2026-05-12 17:10:15 +09:00
tools.py chore: format 2026-06-01 13:56:55 -07:00
validate.py chore: format 2026-06-01 13:56:55 -07:00
webhook.py fix: block private-IP webhook URLs to close SSRF on caller-controlled URL (#24587) 2026-06-01 14:15:51 -07:00