CVE-2026-66373: 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.

Overview

Severity

High (CVSS 7.5)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-07-26

Last Updated

2026-07-27

EPSS Score

0.56% (percentile: 44.7%)

Affected Products (2)

Other

• 21421-17084
• 21628-17084

Revision History

• 2026-07-26: Information published.
• 2026-07-27: Information published.