CVE-2026-110720— Consul-k8s vulnerable to a cross-namespace authorization bypass in component ACL binding rules

Quick assessment

Affected

HashiCorp Tooling

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Consul-k8s 0.42.0 及更高版本存在跨命名空间授权绕过漏洞，该漏洞位于组件的 ACL 绑定规则中，可能允许攻击者获取提升的 Consul 权限。此漏洞（CVE-2026-110720）已在 consul-k8s 2.1.0 和 1.8.18 版本中修复。

CVSS 9.9 · Critical Updated Oct 27, 2026

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Vulnerability Information

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Vulnerability Title

Consul-k8s vulnerable to a cross-namespace authorization bypass in component ACL binding rules

Source: CVE Program / CVE List V5

Vulnerability Description

Consul-k8s versions 0.42.0 and later are vulnerable to a cross-namespace authorization bypass in component ACL binding rules that may allow an attacker to obtain elevated Consul privileges. This vulnerability (CVE-2026-110720) is fixed in consul-k8s 2.1.0 and 1.8.18.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

授权机制不正确

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
HashiCorp	Tooling	0.42.0 ~ 2.0.4	-

II. Public POCs for CVE-2026-110720

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

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III. Intelligence Information for CVE-2026-110720

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Other References for CVE-2026-110720 (1)

https://discuss.hashicorp.com/t/hcsec-2026-50-consul-k8s-vulnerable-to-a-cross-namespace-authorization-bypass-in-component-acl-binding-rules/77915

https://www.cve.org/CVERecord?id=CVE-2026-110720

Same Patch Batch · HashiCorp · 2026-10-26 · 5 CVEs total

CVE-2026-105608	8.8 HIGH	Consul vulnerable to an authorization bypass in service mesh registration
CVE-2026-105765	7.5 HIGH	Consul vulnerable to an authorization bypass in the agent's service mesh leaf certificate
CVE-2026-105626	7.5 HIGH	Consul vulnerable to a denial of service in HTTP APIs
CVE-2026-115804	6.4 MEDIUM	Consul vulnerable to an authorization bypass in health check registration

IV. Related Vulnerabilities

Same product: Tooling

Same vendor: HashiCorp

Same weakness: CWE-863