What’s Vulnerable › Vulnerabilities
CVE-2025-11375: Consul's event endpoint is vulnerable to denial of service
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-10-28 · updated 2026-10-18
- Weakness: CWE-770
Description
Consul and Consul Enterprise’s (“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.
Affected products
- HashiCorp Consul: before 1.18.12; before 1.22.0; from 1.19.0 before 1.20.8; from 1.21.0 before 1.21.6 — fixed in 1.18.12, 1.20.8, 1.21.6, 1.22.0
How to fix
Upgrade to a fixed version: HashiCorp Consul 1.18.12, 1.20.8, 1.21.6, 1.22.0. Check the vendor advisory for mitigations.
References
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