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CVE-2026-73500

Published Aug 12, 2026 CWE-770 EPSS 0.40% (33th pctl)

Overview

CVE-2026-73500 is a known-severity vulnerability. It was published on August 12, 2026.

Technical Description

etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a network attacker who can reach an etcd TLS listener can open many TCP connections and never send a ClientHello. In client/pkg/transport/listener_tls.go, each connection handled by tlsListener.acceptLoop spawns a goroutine that blocks indefinitely inside tls.Conn.Handshake() and remains tracked in the pending map. Unbounded goroutine and map growth can exhaust memory in the etcd process, causing loss of availability for the cluster and, when etcd backs Kubernetes, the control plane. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.

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

GitHub github.com/etcd-io/etcd/commit/2e07efce9745004eb4773cffaada9b5cdf77cff2 GitHub github.com/etcd-io/etcd/commit/89ff6d50796049d4f1136915ba21504b76e7e372 GitHub github.com/etcd-io/etcd/commit/8e4dd0679a2c6b095d2a32a749fda2521c7809a3 GitHub github.com/etcd-io/etcd/commit/f73cba7d920019f91a1ea1f6697833e42731f057 GitHub github.com/etcd-io/etcd/pull/22130 GitHub github.com/etcd-io/etcd/releases/tag/v3.5.33 GitHub github.com/etcd-io/etcd/releases/tag/v3.6.14 GitHub github.com/etcd-io/etcd/releases/tag/v3.7.1 GitHub github.com/etcd-io/etcd/security/advisories/GHSA-6vch-q96h-7gc3

Frequently Asked Questions

What is CVE-2026-73500?

CVE-2026-73500 is a known-severity vulnerability. It was published on August 12, 2026.

How severe is CVE-2026-73500?

CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.

How do I fix or remediate CVE-2026-73500?

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-2026-73500?

CyberStrike's AI-powered security agents can automatically detect CVE-2026-73500 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

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