Consul DoS via Unbounded Content-Length; V1.22.0+ Fixes
CVE-2025-11375 Published on October 28, 2025
Consul's event endpoint is vulnerable to denial of service
Consul and Consul Enterprises (Consul) event endpoint is vulnerable to denial of service (DoS) due to lack of maximum value on the Content Length header. This vulnerability, CVE-2025-11375, is fixed in Consul Community Edition 1.22.0 and Consul Enterprise 1.22.0, 1.21.6, 1.20.8 and 1.18.12.
Weakness Type
Allocation of Resources Without Limits or Throttling
The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
Products Associated with CVE-2025-11375
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Affected Versions
HashiCorp Consul:- Before 1.22.0 is affected.
- Before 1.22.0 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.