Advisoriesby IbisHashiCorpCVE-2026-87090
HashiCorp Consul: improper authorization
Fix: upgrade to 2.0.4 or later (2 fixed versions below)
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Consul Product | >= 0.1.0, < 2.0.4 | 2.0.4 |
| Consul Enterprise Product | >= 0.1.0, < 2.0.4 | 2.0.4 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-863