Improper input validation in Lfprojects Valkey
CVE-2026-27623
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.004 (28.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Lfprojects Valkey
- Valkey-io Valkey — versions >= 9.0.0, < 9.0.3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-27623?
- CVE-2026-27623 is a high-severity vulnerability in Lfprojects Valkey, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2026-02-23.
- How severe is CVE-2026-27623?
- High severity. CVSS v3 base score is 7.5 out of 10.