CVE-2026-87090Network attack vector

Node identity takeover via incomplete catalog authorization

Published Sep 10, 2026 · Updated Sep 10, 2026

Authorization bypass in HashiCorp Consul and Consul Enterprise allows remote authenticated users to take over catalog node identities. The PUT /v1/catalog/register path authorizes a permitted node name without fully validating every node affected by the supplied stable node ID. Exploitation requires an ACL token with node:write on one node and another node's identifier; it can remove that node's registration, services, and health checks.

CVSS severity8.3
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in HashiCorp Consul and Consul Enterprise allows remote authenticated users to take over catalog node identities. The PUT /v1/catalog/register path authorizes a permitted node name without fully validating every node affected by the supplied stable node ID. Exploitation requires an ACL token with node:write on one node and another node's identifier; it can remove that node's registration, services, and health checks.

The record

CVE
CVE-2026-87090
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
HashiCorp
Product
Consul Enterprise
Classifications
CWE-863, T1565.001, T1036
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.1.0 <2.0.4 changes=[{"at":"1.21.18","status":"unaffected"},{"at":"1.22.12","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

HashiCorp · Consul Enterpriseversion=0.1.0 <2.0.4 changes=[{"at":"1.21.18","status":"unaffected"},{"at":"1.22.12","status":"unaffected"}]
HashiCorp · Consulversion=0.1.0 <2.0.4

Published CVSS scores

8.3HashiCorpCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1565.001Stored Data Manipulation
T1036Masquerading

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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