CVE-2026-19012

Authenticated denial of service in Consul Enterprise-to-Community Edition downgrade path

State: Published
Severity: 5.3 Medium
Published: Aug 7, 2026
Updated: Aug 10, 2026
Reserved: Aug 5, 2026

Description

Consul Community Edition and Consul Enterprise 1.18.0 through 2.0.2 are vulnerable to an authenticated denial of service in the Enterprise-to-Community Edition downgrade path that may allow an authorized caller to crash the Consul server. A caller with config-entry write permission can submit a service-router configuration entry that causes the agent to exit unexpectedly. This vulnerability, CVE-2026-19012, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H	HashiCorp

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
ConsulHashiCorp	1.18.0 to before 2.0.3Affected
Consul EnterpriseHashiCorp	1.18.0 to before 2.0.3Affectedfrom 1.21.17Not affectedfrom 1.22.11Not affected

References

https://discuss.hashicorp.com/t/hcsec-2026-25-multiple-vulnerabilities-impacting-hashicorp-consul/77629

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