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Vulnerability record · CVE-2026-66373 · published 25 July 2026

CVE-2026-66373: Double free vulnerability

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.

7.5 CVSS 3.1 High EPSS 0.87% · top 42.7% CWE-415 · Double free Awaiting Analysis
7.5CVSS 3.1 base score
0.87%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
9 Sep 2026Last modified by NVD

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

References

LinkTags
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

Track CVE-2026-66373 inside VULONE

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-66373), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.