Monitor vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
7.5
Valkey database crashes if attacked over the network
CVE-2026-27623
Summary
A malicious actor with network access to Valkey can cause the system to shut down. This can happen if an attacker sends a specific type of request that the system incorrectly identifies as a problem. To prevent this, upgrade to version 9.0.3 or ensure that only trusted users have access to the system.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| lfprojects | valkey | > 9.0.0 , <= 9.0.3 | – |
Original title
Valkey is a distributed key-value database. Starting in version 9.0.0 and prior to version 9.0.3, a malicious actor with network access to Valkey can cause the system to abort by triggering an asse...
Original description
Valkey is a distributed key-value database. Starting in version 9.0.0 and prior to version 9.0.3, a malicious actor with network access to Valkey can cause the system to abort by triggering an assertion. When processing incoming requests, the Valkey system does not properly reset the networking state after processing an empty request. A malicious actor can then send a request that the server incorrectly identifies as breaking server side invariants, which results in the server shutting down. Version 9.0.3 fixes the issue. As an additional mitigation, properly isolate Valkey deployments so that only trusted users have access.
nvd CVSS3.1
7.5
Vulnerability type
CWE-20
Improper Input Validation
Published: 23 Feb 2026 · Updated: 12 Mar 2026 · First seen: 6 Mar 2026