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CVE-2026-56684

7.5 · HIGH

Valkey is a distributed key-value database.

Published Aug 18, 2026CWE-416EPSS 0.89%

Overview

CVE-2026-56684 is a high-severity vulnerability. It was published on August 18, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's tlsProcessPendingData function iterates pending_list while an authenticated client can trigger CLIENT KILL, causing connTLSClose to delete the iterator's cached next node and producing a use-after-free that can crash the server or potentially allow remote code execution when TLS is enabled. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3GitHubgithub.com/valkey-io/valkey/pull/4234GitHubgithub.com/valkey-io/valkey/releases/tag/7.2.14GitHubgithub.com/valkey-io/valkey/releases/tag/8.0.10GitHubgithub.com/valkey-io/valkey/releases/tag/8.1.9GitHubgithub.com/valkey-io/valkey/releases/tag/9.0.5GitHubgithub.com/valkey-io/valkey/releases/tag/9.1.1GitHubgithub.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh

How CyberStrike helps

Frequently asked questions

What is CVE-2026-56684?

CVE-2026-56684 is a high-severity vulnerability. It was published on August 18, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-56684?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-56684?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-56684?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-56684 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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