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CVE-2026-87107— Consul vulnerable to an authorization bypass in the catalog deregistration path

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.

Consul 和 Consul Enterprise 在目录注销（catalog deregistration）路径中存在授权绕过漏洞，可能导致本地 ACL 令牌能够删除通过对等连接（peering）导入的目录对象。拥有 或 权限的调用方可以利用此漏洞，移除从对等集群导入的服务、检查（checks）或节点，而无需具备来自对等端点的相应权限。 该漏洞（CVE-2026-87107）已在以下版本中修复： Consul 2.0.4 Consul Enterprise 1.21.18、1.22.12 和 2.0.4

CVSS 5.4 · Medium

Affected Version Matrix 2

VendorProduct Version RangeStatus
HashiCorp Consul 1.21.0< 2.0.4 affected
HashiCorp Consul Enterprise 1.21.0< 2.0.4 affected
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I. Basic Information for CVE-2026-87107

Vulnerability Information
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Vulnerability Title
Consul vulnerable to an authorization bypass in the catalog deregistration path
Source: CVE Program / CVE List V5
Vulnerability Description
Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog deregistration path that may allow a local ACL token to delete peer-imported catalog objects. A caller with {{service:write}} or {{node:write}} permission may exploit this issue to remove services, checks, or nodes imported from a peered cluster without holding authority over the peer origin. This vulnerability (CVE-2026-87107) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
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 Consul 1.21.0 ~ 2.0.4 -
HashiCorp Consul Enterprise 1.21.0 ~ 2.0.4 -

II. Public POCs for CVE-2026-87107

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III. Intelligence Information for CVE-2026-87107

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Vendor Advisories for CVE-2026-87107 (1)

Same Patch Batch · HashiCorp · 2026-09-10 · 5 CVEs total

CVE-2026-87090 8.3 HIGH Consul vulnerable to an authorization bypass in the catalog node-write path
CVE-2026-87993 7.7 HIGH Consul-template vulnerable to an information disclosure issue in error handling
CVE-2026-88021 7.5 HIGH Consul vulnerable to an authorization bypass in the Connect service mesh
CVE-2026-87106 6.5 MEDIUM Consul vulnerable to a denial of service in the native RPC listener

IV. Related Vulnerabilities

Same product: Consul
Same vendor: HashiCorp
Same weakness: CWE-863

V. Comments for CVE-2026-87107

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