CVE-2026-23479
High
Description
Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client flow does not handle an error return from `processCommandAndResetClient` when re-executing a blocked command. If a blocked client is evicted during this flow, an authenticated attacker can trigger a use-after-free that may lead to remote code execution. This has been patched in version 8.6.3.
SeverityHigh
CVSS7.7
Exploit probability85. percentile2.6%
Product
Redis
PublishedMay 5, 2026
First seenMay 5, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- redis redis8.6.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redis redis | 7.2.0 ≤ v < 8.6.3 | 8.6.3 |
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