HashiCorpCVE-2026-87106
HashiCorp Consul: denial of service
Medium6.5CVE-2026-87106 · Published Sep 10, 2026
Consul and Consul Enterprise are vulnerable to a denial of service in the native RPC listener that may allow an authenticated client to exhaust server memory before ACL authorization is evaluated. A client that can complete the internal RPC mTLS handshake may exploit this issue without holding a valid ACL token. This vulnerability (CVE-2026-87106) 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:N/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-400
More HashiCorp advisories
All HashiCorp| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 15 | HashiCorp Shared library: privilege escalation | Medium6.7 | 2.2.4 |
| Sep 10 | HashiCorp Tooling: information disclosure | High7.7 | 0.43.0 |
| Sep 10 | Consul and Consul Enterprise are vulnerable to an authorization bypass in the... | High7.1 | 2.0.4+1 more |
| Sep 10 | HashiCorp Consul: improper authorization | High8.3 | 2.0.4+1 more |
| Sep 10 | HashiCorp Consul: improper authorization | Medium5.4 | 2.0.4+1 more |
| Aug 24 | HashiCorp Vault: insecure direct object reference | Medium6.8 | 2.0.4+1 more |