Advisoriesby IbisHashiCorpCVE-2026-87107
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 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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Consul Product | >= 1.21.0, < 2.0.4 | 2.0.4 |
| Consul Enterprise Product | >= 1.21.0, < 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:N/I:L/A:L
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-863