Denial of Service Vulnerability in Consul and Consul Enterprise by HashiCorp
CVE-2025-11375

6.5MEDIUM

Key Information:

Vendor

Hashicorp
Status
Consul
Consul Enterprise
Vendor
CVE Published:
28 October 2025

What is CVE-2025-11375?

The event endpoint in Consul and Consul Enterprise by HashiCorp is susceptible to a denial of service attack due to an unregulated maximum value for the Content Length header. This flaw could allow malicious actors to exploit the endpoint, potentially overwhelming it and causing service interruptions. Affected versions include Consul Community Edition 1.22.0 and multiple versions of Consul Enterprise, with fixes implemented in several releases.

Affected Version(s)

Consul 64 bit 0 < 1.22.0

Consul Enterprise 64 bit 1.22.0 < 0

References

https://discuss.hashicorp.com/t/hcsec-2025-28-consuls-eve...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-11375 : Denial of Service Vulnerability in Consul and Consul Enterprise by HashiCorp