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HIGHFixed upstream
CVE-2026-23479
Redis is an in-memory data structure store.
Technology
Redis
CVSS Score
8.8 / 10.0
Affected Versions
>=7.2.0 <8.6.3
Upstream Fix
See upstream advisory
Published
May 5, 2026
OSSeva Coverage
Fixed upstream
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.
Is your Redis deployment affected?
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