CVE-2026-73500Important

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

MSRC advisory NVD CVE.org

Assessment

Severity: Important
CVSS base score: Not published
Impact: Not stated
EPSS, next 30 days: Not scored yet
Public exploit code: No Nuclei template lists it
Exploitability: Not assessed
Publicly disclosed: No
Customer action: Required: apply the update
Component: Mariner
Weakness: CWE-770: Allocation of Resources Without Limits or Throttling
Issued by: GitHub_M
Published: 23 Aug 2026 · August 2026
Last revised: 23 Aug 2026

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

7 affected products

azl3 cert-manager 1.12.15-11 on Azure Linux 3.0
azl3 cloud-provider-kubevirt 0.5.1-6 on Azure Linux 3.0
azl3 flannel 0.24.2-29 on Azure Linux 3.0
azl3 keda 2.14.1-16 on Azure Linux 3.0
azl3 kube-vip-cloud-provider 0.0.10-7 on Azure Linux 3.0
azl3 kubernetes 1.30.10-27 on Azure Linux 3.0
azl3 prometheus-adapter 0.12.0-7 on Azure Linux 3.0

What changed

First observed 14 Oct 2026

23 Oct 2026 · 09:33:49 UTC Public exploit codeUnknown: exploit-code evidence is incomplete or retained → No Nuclei template listed
23 Oct 2026 · 09:33:49 UTC CISA KEVUnknown: catalog evidence is incomplete or retained → Not listed in the collected catalog
23 Oct 2026 · 09:33:49 UTC Source coverage: public-exploit-codeIncomplete → Current
23 Oct 2026 · 09:33:49 UTC Source coverage: first-epssIncomplete → Current
23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete

Show 2 more recent changes

18 Oct 2026 · 14:54:30 UTCLink: August 2026 → /security?release=2026-Aug#cves
14 Oct 2026 · 11:22:42 UTCSource coverage: msrc-cvrf Incomplete → Current

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Explore global source statements, affected packages and advisory history for CVE-2026-73500. The catalog has a separate collection scope from Microsoft release records.

cve-program · CVE-2026-73500

Published

etcd

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "etcd-io",
                    "product": "etcd",
                    "versions": [
                        {
                            "version": "< 3.5.33",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.6.0, < 3.6.14",
                            "status": "affected"
                        },
                        {
                            "version": ">= 3.7.0-alpha.0, < 3.7.1",
                            "status": "affected"
                        }
                    ]
                }

nvd · CVE-2026-73500

Published

No affected-package array is stated in this source revision. Check its state and earlier observations; this does not establish that every package is unaffected.

osv · GHSA-6vch-q96h-7gc3

Published

go.etcd.io/etcd/v3

SEMVER · introduced 3.7.0-alpha.0 → fixed 3.7.1

go.etcd.io/etcd/v3

SEMVER · introduced 3.6.0 → fixed 3.6.14

go.etcd.io/etcd/v3

SEMVER · introduced 0 → fixed 3.5.33

osv · GO-2026-6107

Published

go.etcd.io/etcd/client/pkg/v3

SEMVER · introduced 0 → fixed 3.5.33 → introduced 3.6.0 → fixed 3.6.14 → introduced 3.7.0-alpha.0 → fixed 3.7.1