CVE-2025-46686 Denial of service in Redis
An authenticated user can cause memory exhaustion and denial of service by sending multi-bulk commands with many arguments.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-46686?
CVE-2025-46686 is a low-severity denial of service vulnerability in Redis, published on 23 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Redis through 8.0.3 allows memory consumption via a multi-bulk command composed of many bulks, sent by an authenticated user. This occurs because the server allocates memory for the command arguments of every bulk, even when the command is skipped because of insufficient permissions. NOTE: this is disputed by the Supplier because abuse of the commands network protocol is not a violation of the Redis Security Model.
Weakness: CWE-401
Which versions are affected by CVE-2025-46686?
3 open source packages ship an affected version, including redis, keydb and valkey.
| Package | Affected | Fixed in |
|---|---|---|
redis Bitnami | All versions | 8.0.4 |
keydb Bitnami | All versions to 8.0.3 | None |
valkey Bitnami | All versions | 8.0.4 |
How do I fix CVE-2025-46686?
Upgrade redis to 8.0.4 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-46686 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-46686 exists.
Sources
Also known as BIT-keydb-2025-46686, BIT-redis-2025-46686, BIT-valkey-2025-46686, DEBIAN-CVE-2025-46686, ECHO-074a-b4a7-532d, GHSA-2r7g-8hpc-rpq9 and 6 more.