Auth bypass in Hashicorp Consul
CVE-2026-87107
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.
Vulnerability class: Broken Access Control
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-87107?
- CVE-2026-87107 is a medium-severity vulnerability in Hashicorp Consul, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-09-10.
- How severe is CVE-2026-87107?
- Medium severity. CVSS v3 base score is 5.4 out of 10.