Cyber Resilience

CVE-2026-23631

MediumUpdated

Published: 05 May 2026

Published
05 May 2026
Modified
30 June 2026
KEV Added
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Patch
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CVSS Score v4 6.1 CVSS:4.0/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
EPSS Score 0.0178 75.6th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-23631 is a medium-severity Use After Free (CWE-416) vulnerability in Redis Redis. Its CVSS base score is 6.1 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 24.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Redis is an in-memory data structure store. In all versions of redis-server with Lua scripting, an authenticated attacker can exploit the master-replica synchronization mechanism to trigger a use-after-free on replicas where replica-read-only is disabled or can be disabled, which may…

more

lead to remote code execution. A workaround is to prevent users from executing Lua scripts or avoid using replicas where replica-read-only is disabled. This is patched in version 8.6.3.

CWE(s)
CWE-416

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059.011 Lua Execution
Adversaries may abuse Lua commands and scripts for execution.
attack.mitre.org →
Why these techniques?

Authenticated Lua script execution on Redis triggers UAF for RCE on replicas (T1190 + T1059.011).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-23479Same product: Redis Redis
CVE-2025-62507Same product: Redis Redis
CVE-2025-46817Same product: Redis Redis
CVE-2026-25243Same product: Redis Redis
CVE-2024-46981Same product: Redis Redis
CVE-2025-49844Same product: Redis Redis
CVE-2026-7357Shared CWE-416
CVE-2026-45185Shared CWE-416
CVE-2025-21298Shared CWE-416
CVE-2026-31474Shared CWE-416

Affected Assets

redis
redis
≤ 8.6.3

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-416

Use-after-free exploits that achieve arbitrary code execution are blocked or significantly hardened by non-executable pages and ASLR.

References