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)

highCVSS 7.5CVE-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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 7.5
Published: 2026-07-25
Last updated: 2026-07-28
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-66373

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-663730.47% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-66373	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Redis

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[NEU] [mittel] Redis: Schwachstelle ermöglicht Codeausführungcert-bund · 2026-07-31
unknownRedis security advisory (AV26-748)cccs · 2026-07-27
medium[UPDATE] [medium] Redis: Multiple vulnerabilities allow execution of arbitrary program codecert-bund · 2026-07-27
highGHSA-855v-hq7w-jmjw: Open WebUI: Realtime endpoints accept Redis-revoked JWTs after signout/backchannel logoutghsa · 2026-07-24
highCVE-2026-66373: Redis before 8.8.0, in the unusual case where an authenticated attacker can execute RESTORE, a…msrc · 2026-07-14
highCVE-2026-59219: Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9…nvd · 2026-07-09