How severe is CVE-2026-23479?

CVE-2026-23479 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-23479 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23479?

CVE-2026-23479 affects Redis. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23479?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-23479 have an EU (EUVD) identifier?

Yes. CVE-2026-23479 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27396.

When was CVE-2026-23479 published?

CVE-2026-23479 was published on 2026-05-05 and last updated on 2026-06-30.

CVE-2026-23479

CVE-2026-23479 is a high-severity vulnerability in Redis with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 7.7
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-27396
Weakness: CWE-416
Affected product: Redis
Published: 2026-05-05
Last modified: 2026-06-30

Description

Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client flow does not handle an error return from `processCommandAndResetClient` when re-executing a blocked command. If a blocked client is evicted during this flow, an authenticated attacker can trigger a use-after-free that may lead to remote code execution. This has been patched in version 8.6.3.

Frequently asked questions

What is CVE-2026-23479?: Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client flow does not handle an error return from `processCommandAndResetClient` when re-executing a blocked command. If a blocked client is evicted during this flow, an authenticated attacker can trigger a use-after-free that may lead to remote code execution. This has been patched in version 8.6.3.
How severe is CVE-2026-23479?: CVE-2026-23479 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-23479 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23479?: CVE-2026-23479 affects Redis. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23479?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-23479 have an EU (EUVD) identifier?: Yes. CVE-2026-23479 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27396.
When was CVE-2026-23479 published?: CVE-2026-23479 was published on 2026-05-05 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:*

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