Is CVE-2026-27623 actively exploited?

No active exploitation of CVE-2026-27623 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27623 be exploited remotely?

Yes. CVE-2026-27623 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27623?

CVE-2026-27623 has a CVSS score of 7.5 (HIGH) and an EPSS exploitation probability of 0.08%.

HOME VULNERABILITIESCVE-2026-27623

HIGH

CVE-2026-27623

CWE-20Published: February 23, 2026· Updated: Feb 25, 2026

7.5

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:18.4th

Official 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 Source

Technical Analysis

CVE-2026-27623 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.