Use-after-free in Redis - CVE-2026-23631
Published: May 5, 2026
Vulnerability identifier: #VU130201
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-23631
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Redis
Redis
Software vendor:
Redis Labs
Redis Labs
Description
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to use-after-free in the Lua scripting synchronization mechanism when exploiting master-replica synchronization. A remote user can trigger the flaw through crafted Lua script execution to execute arbitrary code.
Only replicas with replica-read-only disabled are vulnerable.
Remediation
Install security update from vendor's website.