Vulnerability 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 Score
HIGH
Related Weaknesses (CWE)
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
- https://lists.debian.org/debian-lts-announce/2026/08/msg00012.html
- https://github.com/berabuddies/redis-poc
FAQ
What is CVE-2026-66373?
CVE-2026-66373 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 mor...
How severe is CVE-2026-66373?
CVE-2026-66373 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-66373?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.