CVE-2026-66373: Redis

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

Redis before 8.8.0, in the unusual case where an authenticated attacker can execute RESTORE, allows remote code execution via a RESTORE payload where the same NACK (pending entry) is referenced by more than one consumer, because deleting both consumers via XGROUP DELCONSUMER leads to a double free. NOTE: this issue exists because of an incomplete fix for CVE-2026-25243.

Affected products

• Redis Redis: before 8.8.0 (fixed in 8.8.0)

Published 2026-07-25. Last modified 2026-09-09.