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CVE-2026-19015— Uncontrolled resource consumption in the Consul Connect CA roots endpoint

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 1.2.0版本至2.0.2版本存在资源管理错误漏洞，该漏洞源于Connect CA roots端点存在不受控制的资源消耗问题，可能允许远程调用者无限制地增长代理的Connect CA roots缓存，导致资源消耗。

CVSS 5.3 · Medium EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
HashiCorp Consul 1.2.0< 2.0.3 affected
HashiCorp Consul Enterprise 1.2.0< 2.0.3 affected
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I. Basic Information for CVE-2026-19015

Vulnerability Information
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Vulnerability Title
Uncontrolled resource consumption in the Consul Connect CA roots endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Consul Community Edition and Consul Enterprise 1.2.0 through 2.0.2 are vulnerable to an uncontrolled resource consumption issue in the Connect CA roots endpoint that may allow a remote caller to grow the agent's Connect CA roots cache without bound, defeating the operator's cache-disable configuration. This vulnerability, CVE-2026-19015, 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:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
HashiCorp Consul 资源管理错误漏洞
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 1.2.0版本至2.0.2版本存在资源管理错误漏洞，该漏洞源于Connect CA roots端点存在不受控制的资源消耗问题，可能允许远程调用者无限制地增长代理的Connect CA roots缓存，导致资源消耗。
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 1.2.0 ~ 2.0.3 -
HashiCorp Consul Enterprise 1.2.0 ~ 2.0.3 -

II. Public POCs for CVE-2026-19015

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III. Intelligence Information for CVE-2026-19015

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Vendor Advisories for CVE-2026-19015 (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-2026-19014 4.3 MEDIUM Uncontrolled resource consumption in the Consul Connect authorization endpoint
CVE-2026-15970 4.2 MEDIUM L7 intention authorization bypass via custom public listener
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-770

V. Comments for CVE-2026-19015

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