CVE-2026-87106
CVE-2026-87106 · Consul vulnerable to a denial of service in the native RPC listener
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 6.5 · Medium · EPSS 0.4% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
consul
- Versions
- ≥ 1.21.0, < 2.0.4: Affected (semver)
Update to 2.0.4
consul enterprise
- Versions
- ≥ 1.21.0, < 2.0.4: Affected; ≥ 1.21.18: Not affected; ≥ 1.22.12: Not affected (semver)
Update to 1.21.18
consul Ubuntu:18.04:LTS
- Versions
- 0.6.4~dfsg-3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
consul Ubuntu:20.04:LTS
- Versions
- 1.0.7~dfsg1-5ubuntu1
- 1.4.4~dfsg1-2ubuntu2
- 1.5.2+dfsg1-6
- 1.5.2+dfsg1-10
- 1.5.2+dfsg1-12
- 1.5.2+dfsg2-14
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
consul Ubuntu:22.04:LTS
- Versions
- 1.7.4+dfsg1-1
- 1.8.7+dfsg1-3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published