CVE-2026-87090

EUVD-2026-75679

10.09.2026, 19:17

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
HashiCorp	CNA	8.3 HIGH	NETWORK	LOW	LOW	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
hashicorp	consul	0.1.0 ≤ 𝑥 < 2.0.4	CNA

Common Weakness Enumeration

CWE-863 - Incorrect Authorization
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.

References

https://discuss.hashicorp.com/t/hcsec-2026-34-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-node-write-path/77736