> CVE-2026-73500 [HIGH]

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PUBLISHED
2026-08-12 22:17
MODIFIED
2026-08-12 22:17
CVSS_SCORE V3
8.7
EPSS (Prob. Exploit)
0.40%
Top 66.1%
DATA SOURCES:
NVD đź”— 2026-08-12 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-11-01 GITHUB đź”— 2026-10-29 OSV đź”— 2026-10-26 MSRC đź”— 2026-09-01

> 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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-770

> CWE DETAILED DESCRIPTIONS

CWE-770: Allocation of Resources Without Limits or Throttling - The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: RHTAS 1.3.8 - Red Hat Trusted Artifact Signer Release
The 1.3.8 release of Red Hat Trusted Artifact Signer OpenShift Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifa...
Red Hat Security Advisory: RHTAS 1.3.8 - Red Hat Trusted Artifact Signer Release
The 1.3.8 release of Red Hat Trusted Artifact Signer OpenShift Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifa...
Red Hat Security Advisory: RHTAS 1.3.8 - Red Hat Trusted Artifact Signer Release
The 1.3.8 release of Red Hat Trusted Artifact Signer OpenShift Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifa...
Red Hat Security Advisory: Multicluster Global Hub 1.5.8 security update
Multicluster Global Hub v1.5.8 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this update as having a s...
Red Hat Security Advisory: multicluster engine for Kubernetes v2.8.11 security update
Red Hat multicluster engine for Kubernetes v2.8 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this upd...
Red Hat Security Advisory: multicluster engine for Kubernetes v2.10.7 security update
Red Hat multicluster engine for Kubernetes v2.10 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this up...
Red Hat Security Advisory: multicluster engine for Kubernetes v2.9.8 security update
Red Hat multicluster engine for Kubernetes v2.9 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this upd...
Red Hat Security Advisory: multicluster engine for Kubernetes v2.6.15 security update
Red Hat multicluster engine for Kubernetes v2.6 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this upd...
Red Hat Security Advisory: multicluster engine for Kubernetes v2.17.3 security update
Red Hat multicluster engine for Kubernetes v2.17 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this up...
Red Hat Security Advisory: multicluster engine for Kubernetes v2.11.7 security update
Red Hat multicluster engine for Kubernetes v2.11 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this up...
Red Hat Security Advisory: Multicluster Global Hub 1.6.6 security update
Multicluster Global Hub v1.6.6 general availability release images, which provide security fixes, bug fixes, and updated container images. Red Hat Product Security has rated this update as having a s...
Red Hat Security Advisory: RHTAS 1.4.4 - Red Hat Trusted Artifact Signer Release
The 1.4.4 release of Red Hat Trusted Artifact Signer OpenShift Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifa...
Red Hat Security Advisory: RHTAS 1.4.4 - Red Hat Trusted Artifact Signer Release
The 1.4.4 release of Red Hat Trusted Artifact Signer OpenShift Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifa...
Red Hat Security Advisory: RHTAS 1.4.4 - Red Hat Trusted Artifact Signer Release
The 1.4.4 release of Red Hat Trusted Artifact Signer OpenShift Operator. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifa...
Red Hat Security Advisory: Red Hat OpenStack Platform 17.1 security advisory
An update for etcd, collectd-sensubility and collectd-libpod-stats is now available for Red Hat OpenStack Platform 17.1 (Wallaby) for Red Hat Enterprise Linux (RHEL) 9.2. Red Hat Product Security has...
Red Hat Security Advisory: Red Hat OpenStack Platform 16.2 security advisory
An update for etcd, collectd-sensubility and collectd-libpod-stats is now available for Red Hat OpenStack Platform 16.2 (Train). Red Hat Product Security has rated this update as having a security im...
Red Hat Security Advisory: Red Hat OpenShift Dev Spaces 3.31.0 Release.
Red Hat OpenShift Dev Spaces 3.31.0 has been released.

> GITHUB SECURITY ADVISORY

GHSA-6vch-q96h-7gc3 HIGH

etcd: `tlsListener.acceptLoop` spawns unbounded handshake goroutines with no deadline

AFFECTED PACKAGES:
GO / go.etcd.io/etcd/v3
< 3.5.33
Fixed in: 3.5.33
GO / go.etcd.io/etcd/v3
>= 3.6.0, < 3.6.14
Fixed in: 3.6.14
GO / go.etcd.io/etcd/v3
>= 3.7.0-alpha.0, < 3.7.1
Fixed in: 3.7.1

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

etcd: `tlsListener.acceptLoop` spawns unbounded handshake goroutines with no deadline

AFFECTED PACKAGES:
Unknown / Unknown
653 versions affected
ALIASES:
BIT-etcd-2026-73500, GHSA-6vch-q96h-7gc3, GO-2026-6107

> HISTORIQUE DES MODIFICATIONS

Première apparition
12/08/2026 22:17
Source: NVD
đź“Š ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-770: Allocation of Resources Without Limits or Throttling - The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the ...
Total des modifications: 1 Dernière mise à jour: 2 months ago

> REFERENCES

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