CVE-2026-23631

Description

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 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.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_M
CVSS severity: MEDIUM
CVSS score: 6.1 / 10
CVSS vector: 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
Effective score: 6.1 / 10 MEDIUM source: CNA overview
CWE(s): CWE-416
Reserved: 2026-01-14
Published: 2026-05-05 18:39 UTC
Last updated: 2026-05-06 15:23 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/23xxx/CVE-2026-23631.json
Linked Threat: CVE-2026-23631 — CVE-2026-23631

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-05-05 17:17:03 UTC
NVD last modified: 2026-05-06 16:14:21 UTC
NVD CVSS v3.1: 8.1 / 10 HIGH source: nvd@nist.gov
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Exploitability subscore: 2.8 / 10
Impact subscore: 5.2 / 10
EPSS score: 0.0008 (probability of exploitation in next 30 days)
EPSS percentile: 23.32% vs all CVEs — higher = more likely to be exploited, as of 2026-05-25

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-27398
Assigner: GitHub_M
Published: May 5, 2026, 4:39:32 PM
Updated: May 6, 2026, 1:23:48 PM
EUVD base score (CVSS 4.0): 6.1 / 10
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
EUVD-reported EPSS: 0.0800
Vendors: Redis
Products: Redis (< 8.6.3)

Redis (< 8.6.3)

ENISA description: 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 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.

EUVD references (2)

Microsoft Security Response Center MSRC

Microsoft's vendor-authoritative record from the Security Update Guide — its own CVSS score, impact, severity rating, exploit assessment, and KB-article fixes. Refreshed 2026-09-25 03:07 UTC (source: CVRF).

MS severity: Moderate
Release: 2026-May

Affected products (1)

Vendor	Product	Versions	Platforms
redis	redis	`< 8.6.3` (affected)	—

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:*

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

https://github.com/redis/redis/security/advisories/GHSA-8ghh-qpmp-7826 x_refsource_CONFIRM
https://github.com/redis/redis/releases/tag/8.6.3 x_refsource_MISC

MITRE references (2) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

https://github.com/redis/redis/releases/tag/8.6.3 x_refsource_MISC
https://github.com/redis/redis/security/advisories/GHSA-8ghh-qpmp-7826 x_refsource_CONFIRM

Web references (8)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

MSRC update guide: CVE-2026-23631 msrc
https://attackerkb.com/topics/CVE-2026-23631 rapid7:attackerkb.com
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-27398 rapid7:euvd.enisa.europa.eu
http://cwe.mitre.org/data/definitions/416.html rapid7:cwe.mitre.org
https://security.alpinelinux.org/vuln/CVE-2026-23631 rapid7:security.alpinelinux.org
https://nvd.nist.gov/vuln/detail/CVE-2026-23631 tenable:nvd.nist.gov
https://www.first.org/epss/ tenable:www.first.org
https://www.cve.org/CVERecord?id=CVE-2026-23631 tenable:www.cve.org

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/redis/redis/releases/tag/8.6.3 security-advisories@github.com Release Notes
https://github.com/redis/redis/security/advisories/GHSA-8ghh-qpmp-7826 security-advisories@github.com MitigationVendor Advisory

Remediations (15)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

CVE-2026-23631 - Vulnerability Details - OpenCVE

web:app.opencve.io

Remediation No vendor fix or workaround currently provided. OpenCVE Recommended Actions Upgrade redis to version 8.6.3 or later, which contains the patch . Disable Lua scripting or restrict it to trusted users when the server is in use. Ensure replica‑read‑only is enabled on all replicas, or avoid using replicas where this setting can be ...

2026-05-23 21:13 UTC
Microsoft Patch Tuesday March 2026 - 78 Vulnerabilities Fixed ...

web:cybersecuritynews.com

Microsoft released its March 2026 Patch Tuesday security update on March 10, 2026 , addressing 78 vulnerabilities across Windows, Microsoft Office, Azure, SQL Server, and .NET. The update includes one actively exploited zero-day vulnerability and multiple Critical-rated flaws demanding immediate attention from security teams. The most urgent fix this month is CVE - 2026 -21262, the sole zero-day ...

2026-05-23 21:13 UTC
CVE-2026-23631 | Security Details | Sonatype Guide

web:guide.sonatype.com

CVE-2026-23631 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 lead to remote code execution.

2026-05-23 21:13 UTC
Nvd - Cve-2026-20631

web:nvd.nist.gov

An official website of the United States government Here's how you know

2026-05-23 21:13 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-23 21:13 UTC
CVE-2026-23631 - security-tracker.debian.org

web:security-tracker.debian.org

Vulnerable and fixed packages The table below lists information on source packages.

2026-05-23 21:13 UTC
Critical Patches Issued for Microsoft Products, April 14, 2026

web:www.cisecurity.org

<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...

2026-05-23 21:13 UTC
CVE Record: CVE-2026-32631

web:www.cve.org

Vulnerability detail for CVE - 2026 -32631 Notice: Expanded keyword searching of CVE Records (with limitations) is now available in the search box above. Learn more here.

2026-05-23 21:13 UTC
Windows 11 KB5074109, KB5073455 January 2026 Patch Tuesday ... - Neowin

web:www.neowin.net

Microsoft has released Patch Tuesday updates for Windows 11 KB5074109, KB5073455 for January 2026 . Here's what's included.

2026-05-23 21:13 UTC
Patch Tuesday May 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-05-23 21:13 UTC
Microsoft Security AdvisoryCVE-2026-26131 - .NET Elevation ... - GitHub

web:github.com

Microsoft Security AdvisoryCVE- 2026 -26131 - .NET Elevation of Privilege Vulnerability Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in...

2026-05-26 02:45 UTC
April 14, 2026—KB5082052 (OS Build 22631.6936) - Microsoft Support

web:support.microsoft.com

This cumulative update for Windows 11, version 23H2 (KB5082052), includes the latest security fixes and improvements, along with non-security updates from last month's optional preview release. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For ...

2026-05-26 02:45 UTC
Microsoft Confirms Active 0-Day Exploit—Check Emergency Mitigation

web:www.forbes.com

Updated May 17: This article, originally published May 16, has been updated to include further details on the emergency mitigation process recommended after the CVE - 2026 -42897 Microsoft Exchange ...

2026-05-26 02:45 UTC
Microsoft fixes 167 security flaws in April, second biggest Patch ...

web:www.pcworld.com

This month's Patch Tuesday includes an actively exploited Office zero-day vulnerability and several critical RCE bugs in Windows and Remote Desktop.

2026-05-26 02:45 UTC
I tested Windows 11 March 2026 Updates: Everything new ... - Windows Latest

web:www.windowslatest.com

Windows 11 March 2026 Patch Tuesday update adds Emoji 16.0, Sysmon, network speed test, reliability improvements, and security fixes.

2026-05-26 02:45 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-23631.json.

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