CVE-2026-87090CWE-863broken-access-control

CVE-2026-87090

High · published September 10, 2026

CVSS v3.1
8.3
EPSS
0%
Percentile
30.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00372 · 30.0th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-09-10T23:17Z
References (1)
https://discuss.hashicorp.com/t/hcsec-2026-34-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-node-write-path/77736 · [email protected]
EPSS history
Timeline
  • 12 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 10 SEP 18:54Z
    Consul vulnerable to an authorization bypass in the catalog node-write path
    cvelistv5