CVE-2026-105626

Consul vulnerable to a denial of service in HTTP APIs

State: Published
Severity: 7.5 High
Published: Oct 26, 2026
Updated: Oct 26, 2026
Reserved: Oct 5, 2026

Description

HashiCorp Consul and Consul Enterprise are vulnerable to a denial of service in the HTTP API that may allow an unauthenticated attacker to exhaust memory on a Consul agent. This vulnerability (CVE-2026-105626) is fixed in Consul Community Edition 2.1.0 and Consul Enterprise 2.1.0 and 1.21.19.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	HashiCorp

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
ConsulHashiCorp	0.6.0 to before 2.1.0Affected
Consul EnterpriseHashiCorp	0.6.0 to before 2.1.0Affectedfrom 1.21.19Not affected

References

https://discuss.hashicorp.com/t/hcsec-2026-48-consul-vulnerable-to-a-denial-of-service-in-http-apis/77913

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