PT-2026-37086 · Redis · Redis-Server

Yoni Shiraz · Published 2026-05-05 · Updated 2026-05-05 · CVE-2026-23631

Positive Technologies (AI Summary)

CVSS v4.0

6.1

Medium

Base vector

AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions redis-server versions prior to 8.6.3

Description An authenticated attacker can exploit the master-replica synchronization mechanism in redis-server instances utilizing Lua scripting. This can trigger a use-after-free condition on replicas where replica-read-only is disabled or can be disabled, potentially leading to remote code execution. A use-after-free is a memory corruption flaw that occurs when an application continues to use a pointer after it has been freed.

Recommendations Update to version 8.6.3. Prevent users from executing Lua scripts. Avoid using replicas where replica-read-only is disabled.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-23631

Affected Products

Redis-Server

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-23631 · Security Note
• https://github.com/redis/redis/security/advisories/GHSA-8ghh-qpmp-7826 · Note
• https://github.com/redis/redis/releases/tag/8.6.3 · Note
• https://twitter.com/infoflowcloud/status/2051742840707813825 · Twitter Post
• https://twitter.com/CVEnew/status/2051741662150295883 · Twitter Post