CVE-2026-87107

Consul vulnerable to an authorization bypass in the catalog deregistration path

State: Published
Severity: 5.4 Medium
Published: Sep 10, 2026
Updated: Sep 10, 2026
Reserved: Sep 8, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L	HashiCorp

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
ConsulHashiCorp	1.21.0 to before 2.0.4Affected
Consul EnterpriseHashiCorp	1.21.0 to before 2.0.4Affectedfrom 1.21.18Not affectedfrom 1.22.12Not affected

References

https://discuss.hashicorp.com/t/hcsec-2026-36-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-deregistration-path/77738

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