Distributed Key-Value Database Vulnerability in Valkey
CVE-2026-27623

7.5HIGH

Key Information:

Vendor

Valkey-io

Status
Valkey
Vendor
CVE Published:
23 February 2026

What is CVE-2026-27623?

Valkey, a distributed key-value database, has a vulnerability in versions 9.0.0 through 9.0.2 that allows a malicious actor to trigger a denial of service (DoS). This can occur when the system improperly maintains its networking state after handling empty requests, causing it to erroneously interpret subsequent valid requests as threats to internal invariants. As a result, the server may abort its operations. To mitigate this risk, it is advised to update to version 9.0.3 or later and ensure that Valkey installations are securely isolated from untrusted users.

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Affected Version(s)

valkey >= 9.0.0, < 9.0.3

References

https://github.com/valkey-io/valkey/security/advisories/G...
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CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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