Consul Auth Bypass in Catalog Node-Write Path (2.0.3)
CVE-2026-87090 Published on September 10, 2026
Consul vulnerable to an authorization bypass in the catalog node-write path
Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog node-write path that may allow an authenticated attacker to delete another node's catalog registration and take over its node identity. An attacker with a token granting node-write permission on any single node name may exploit this issue if they can obtain the node ID of a node they do not control. This vulnerability (CVE-2026-87090) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2026-87090 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-87090
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Affected Versions
HashiCorp Consul:- Version 0.1.0 and below 2.0.4 is affected.
- Version 0.1.0 and below 2.0.4 is affected.