CVE-2026-87090

Consul vulnerable to an authorization bypass in the catalog node-write path

Published: Sep 10, 2026Updated: Sep 10, 2026 Sources: CVE List NVDCWE-863

8.3HIGH

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:LConfidentiality

Low

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-863

Affected Products

HashiCorp

commercial·USaka hashicorp inc.

ConsulOn-prem

Cloud & SaaS / api-gateway

Consul EnterpriseOn-prem

Cloud & SaaS / container-orchestration

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

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References

https://discuss.hashicorp.com/t/hcsec-2026-34-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-node-write-path/77736

discuss.hashicorp.com

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