CVE-2026-66373

Description

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.

CVSS Vector

References

• https://github.com/berabuddies/redis-poc
• https://github.com/redis/redis/compare/8.6.4...8.8.0
• https://github.com/redis/redis/pull/15081
• https://news.ycombinator.com/item?id=49024938
• https://x.com/Fried_rice/status/2080059356322918777