CVE-2026-87090 — Consul vulnerable to an authorization bypass in the catalog node-write path

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
HashiCorp / Consul	affected 0.1.0 before 2.0.4
HashiCorp / Consul Enterprise	affected 0.1.0 before 2.0.4

CWE

CWE-863

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.