CVE-2025-49844 – Redis CVSS 10.0: How One Provider Responded
A practitioner’s post details response to CVE-2025-49844 (CVSS 10.0) in Redis, referencing GHSA-4789-qfc9-5f9q. Mitigations included immediate ACL restrictions disabling EVAL/EVALSHA, upgrading from Redis 8.2.1 to 8.2.2 via Sentinel-managed HA failover, and further hardening by blocking SCRIPT/FUNCTION commands. The environment operated Redis on private networks with strict firewalling and validated no anomalous command usage. The post demonstrates how operational readiness (HA + ACLs) reduces patch risk and enables rapid upgrade without downtime.
CORTEX Protocol Intelligence Assessment
{"Business Impact":"Unmitigated Redis RCE/abuse threatens data integrity and availability across caching tiers.","Technical Context":"ACL-based command restrictions plus HA upgrade path neutralized exposure pending patch rollout."}
Strategic Intelligence Guidance
- Apply vendor patches; enforce ACLs to restrict dangerous commands.
- Isolate Redis from public networks; restrict to known app segments.
- Continuously audit command usage (commandstats) and ACL violations.
- Adopt HA strategies to enable zero/low-downtime security upgrades.
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Intelligence Source: CVE-2025-49844 - The Redis CVSS 10.0 vulnerability and how we responded | Oct 15, 2025