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CVE-2026-15970— L7 intention authorization bypass via custom public listener

Quick assessment

Affected
HashiCorp Consul
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.

HashiCorp Consul是美国HashiCorp公司的一款服务发现与配置管理中间件。 HashiCorp Consul 1.20.1至2.0.2版本存在授权问题漏洞，该漏洞源于服务代理配置自定义公共监听器时存在L7意图授权绕过，可能导致经过身份验证的网格工作负载访问被基于路径的拒绝意图阻止的HTTP路径。

CVSS 4.2 · Medium EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1098.004 · SSH Authorized Keys

Affected Version Matrix 2

VendorProduct Version RangeStatus
HashiCorp Consul 1.20.1< 2.0.3 affected
HashiCorp Consul Enterprise 1.20.1< 2.0.3 affected
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I. Basic Information for CVE-2026-15970

Vulnerability Information
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Vulnerability Title
L7 intention authorization bypass via custom public listener
Source: CVE Program / CVE List V5
Vulnerability Description
Consul Community Edition and Consul Enterprise 1.20.1 through 2.0.2 are vulnerable to an L7 intention authorization bypass when a service proxy is configured with a custom public listener. An authenticated mesh workload may reach HTTP paths that are blocked by a path-based deny intention. This vulnerability, CVE-2026-15970, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用未经净化的URL路径进行授权决策
Source: CVE Program / CVE List V5
Vulnerability Title
HashiCorp Consul 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HashiCorp Consul是美国HashiCorp公司的一款服务发现与配置管理中间件。 HashiCorp Consul 1.20.1至2.0.2版本存在授权问题漏洞，该漏洞源于服务代理配置自定义公共监听器时存在L7意图授权绕过，可能导致经过身份验证的网格工作负载访问被基于路径的拒绝意图阻止的HTTP路径。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
HashiCorp Consul 1.20.1 ~ 2.0.3 -
HashiCorp Consul Enterprise 1.20.1 ~ 2.0.3 -

II. Public POCs for CVE-2026-15970

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III. Intelligence Information for CVE-2026-15970

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Vendor Advisories for CVE-2026-15970 (1)

Same Patch Batch · HashiCorp · 2026-08-07 · 8 CVEs total

CVE-2026-15972 7.5 HIGH Unauthenticated denial of service via unbounded external gRPC connection acceptance
CVE-2026-19017 6.8 MEDIUM Consul vulnerable to partial arbitrary file read via Vault Connect CA provider
CVE-2026-19113 5.3 MEDIUM Unauthenticated denial of service via unbounded request body processing
CVE-2026-19012 5.3 MEDIUM Authenticated denial of service in Consul Enterprise-to-Community Edition downgrade path
CVE-2026-19015 5.3 MEDIUM Uncontrolled resource consumption in the Consul Connect CA roots endpoint
CVE-2026-19014 4.3 MEDIUM Uncontrolled resource consumption in the Consul Connect authorization endpoint
CVE-2026-19016 4.2 MEDIUM Authorization bypass for session deletion in the transaction API

IV. Related Vulnerabilities

Same product: Consul
Same vendor: HashiCorp
Same weakness: CWE-647

V. Comments for CVE-2026-15970

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