04 June 2026
Reference: CVE-2026-23479
1. What is being reported?
The Redis software, used to store and manage data in memory, has a vulnerability in versions from 7.2.0 up to 8.6.3. This flaw involves how Redis handles certain commands when a client is blocked and then removed. An attacker who is already authenticated could exploit this to run harmful code on the server.
2. What this means in plain English
If your organisation uses Redis within your IT systems, this vulnerability could let attackers take control of your data or systems remotely. This could lead to data loss, disruption, or further attacks. Even small organisations can be at risk if they use affected Redis versions and do not update.
3. Could this affect a small business?
Small businesses or charities using Redis versions between 7.2.0 and 8.6.3 could be affected, especially if Redis is accessible to users who can authenticate. Organisations not using Redis or using updated versions are unlikely to be affected.
4. What to do now
- Check if your systems use Redis software and identify the version number.
- If using Redis between versions 7.2.0 and 8.6.3, plan to update to version 8.6.3 or later as soon as possible.
- Limit access to Redis servers to trusted users only, and monitor for unusual activity.
- Ask your IT provider or software supplier for confirmation that Redis is updated and secure.
5. Ask your IT provider
Can you confirm if our Redis software is version 8.6.3 or later, and if not, can you update it to fix the recent security vulnerability CVE-2026-23479?
6. Bottom line
Update Redis software promptly to protect your organisation from a serious remote code execution risk.
Information based on NVD, CISA KEV, and reputable security news reporting.