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CVE-2026-73500 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/etcd-io/etcd/commit/2e07efce9745004eb4773cffaada9b5cdf77cff2	[email protected]
https://github.com/etcd-io/etcd/commit/89ff6d50796049d4f1136915ba21504b76e7e372	[email protected]
https://github.com/etcd-io/etcd/commit/8e4dd0679a2c6b095d2a32a749fda2521c7809a3	[email protected]
https://github.com/etcd-io/etcd/commit/f73cba7d920019f91a1ea1f6697833e42731f057	[email protected]
https://github.com/etcd-io/etcd/pull/22130	[email protected]
https://github.com/etcd-io/etcd/releases/tag/v3.5.33	[email protected]
https://github.com/etcd-io/etcd/releases/tag/v3.6.14	[email protected]
https://github.com/etcd-io/etcd/releases/tag/v3.7.1	[email protected]
https://github.com/etcd-io/etcd/security/advisories/GHSA-6vch-q96h-7gc3	[email protected]

see all 9 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-770	Allocation of Resources Without Limits or Throttling	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Aug 13, 2026	CVE Modified	CISA-ADP
Aug 12, 2026	New CVE Received	[email protected]