CVE-2026-87106CWE-400denial-of-service

CVE-2026-87106

Medium · published September 10, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
34.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00411 · 34.2th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-09-10T23:17Z
References (1)
https://discuss.hashicorp.com/t/hcsec-2026-35-consul-vulnerable-to-a-denial-of-service-in-the-native-rpc-listener/77737 · [email protected]
EPSS history
Timeline
  • 12 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 10 SEP 18:55Z
    Consul vulnerable to a denial of service in the native RPC listener
    cvelistv5