CVE-2026-105626 HashiCorp Consul - Denial of Service

HashiCorp Consul and Consul Enterprise < 2.1.0 contain a denial of service caused by memory exhaustion via the HTTP API, letting unauthenticated attackers exhaust memory on a Consul agent, exploit requires no authentication.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
26 October 2026
Updated
27 October 2026
Weakness
CWE-770

Vendor fix

Upgrade to Consul Community Edition 2.1.0, Consul Enterprise 2.1.0 or 1.21.19.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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