How severe is CVE-2026-25243?

CVE-2026-25243 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-2026-25243 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25243?

CVE-2026-25243 affects Redis. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25243?

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-2026-25243 have an EU (EUVD) identifier?

Yes. CVE-2026-25243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27410.

When was CVE-2026-25243 published?

CVE-2026-25243 was published on 2026-05-05 and last updated on 2026-06-30.

CVE-2026-25243

CVE-2026-25243 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-122.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 7.7
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-27410
Weakness: CWE-122
Affected product: Redis
Published: 2026-05-05
Last modified: 2026-06-30

Description

Redis is an in-memory data structure store. In versions of redis-server up to 8.6.3, the RESTORE command does not properly validate serialized values. An authenticated attacker with permission to execute RESTORE can supply a crafted serialized payload that triggers invalid memory access and may lead to remote code execution. A workaround is to restrict access to the RESTORE command with ACL rules. This is patched in version 8.6.3.

Frequently asked questions

What is CVE-2026-25243?: Redis is an in-memory data structure store. In versions of redis-server up to 8.6.3, the RESTORE command does not properly validate serialized values. An authenticated attacker with permission to execute RESTORE can supply a crafted serialized payload that triggers invalid memory access and may lead to remote code execution. A workaround is to restrict access to the RESTORE command with ACL rules. This is patched in version 8.6.3.
How severe is CVE-2026-25243?: CVE-2026-25243 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-2026-25243 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25243?: CVE-2026-25243 affects Redis. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25243?: 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-2026-25243 have an EU (EUVD) identifier?: Yes. CVE-2026-25243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27410.
When was CVE-2026-25243 published?: CVE-2026-25243 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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