CVE-2025-11375: Github.com/hashicorp/consul Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-qh7p-pfq3-677h
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CVSS 6.5
CWE-770
Published
Advisory Summary

CVE-2025-11375 is a MODERATE (CVSS 6.5) denial of service vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Github.com/hashicorp/consul libraries in the Go ecosystem. The issue involves consul event endpoint is vulnerable to denial of service. Remediation is available by upgrading affected packages to version 1.22.0.

CVE-2025-11375 at a Glance

CVE Identifier CVE-2025-11375
GHSA Identifier GHSA-qh7p-pfq3-677h
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-770: Allocation of Resources Without Limits or Throttling
Affected Product Github.com/hashicorp/consul
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2025-11375

To remediate this vulnerability, upgrade all affected Github.com/hashicorp/consul dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/hashicorp/consul fixed: 1.22.0 
Upgrade github.com/hashicorp/consul to 1.22.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/hashicorp/consul

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-11375, inspect your project dependencies for Github.com/hashicorp/consul:

inspect dependencies for github.com/hashicorp/consul

Analyze the terminal output to locate any version of Github.com/hashicorp/consul in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.22.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. In Github.com/hashicorp/consul, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2025-11375 Affected Github.com/hashicorp/consul Versions

1 component(s)
Fixed Versions:
1.22.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/hashicorp/consul
golang/github.com/hashicorp/consul
Go
< 1.22.0
1.22.0

References

NVD — CVE-2025-11375 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11375
Github.com/hashicorp/consul Source Repository REPOSITORY
https://github.com/hashicorp/consul/pull/22836
Security Fix Commit FIX COMMIT
https://github.com/hashicorp/consul/commit/e794201d0c618333d81ad775270f7b32801178fb
discuss.hashicorp.com/t/hcsec-2025-28-con... WEB
https://discuss.hashicorp.com/t/hcsec-2025-28-consuls-event-endpoint-is-vulnerable-to-denial-of-service/76723
Github.com/hashicorp/consul Source Repository REPOSITORY
https://github.com/hashicorp/consul
Github.com/hashicorp/consul Release RELEASE
https://github.com/hashicorp/consul/releases/tag/v1.22.0
pkg.go.dev/vuln/go-2025-4082 WEB
https://pkg.go.dev/vuln/GO-2025-4082

Frequently Asked Questions

What is CVE-2025-11375?
CVE-2025-11375 is a security vulnerability in Github.com/hashicorp/consul involving Consul event endpoint is vulnerable to denial of service under CWE-770: Allocation of Resources Without Limits or Throttling.
Which Github.com/hashicorp/consul versions are affected?
Affected versions include releases prior to 1.22.0 across affected packages: github.com/hashicorp/consul.
What version fixes CVE-2025-11375?
Upgrading to 1.22.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/hashicorp/consul affected?
Yes, github.com/hashicorp/consul is affected in releases prior to 1.22.0. Upgrade your dependency to 1.22.0 or later.
What is the CVSS score of CVE-2025-11375?
CVE-2025-11375 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2025-11375?
CVE-2025-11375 is classified under CWE-770: Allocation of Resources Without Limits or Throttling (The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.).
How can I check Go dependencies for CVE-2025-11375?
Run the dependency tree command: 'inspect dependencies for github.com/hashicorp/consul'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qh7p-pfq3-677h",
  "modified" : "2025-11-05T22:12:37Z",
  "published" : "2025-10-28T21:30:33Z",
  "aliases" : [ "CVE-2025-11375" ],
  "summary" : "Consul event endpoint is vulnerable to denial of service",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hashicorp/consul"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.22.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-11375"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/consul/pull/22836"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/consul/commit/e794201d0c618333d81ad775270f7b32801178fb"
  }, {
    "type" : "WEB",
    "url" : "https://discuss.hashicorp.com/t/hcsec-2025-28-consuls-event-endpoint-is-vulnerable-to-denial-of-service/76723"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/hashicorp/consul"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hashicorp/consul/releases/tag/v1.22.0"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2025-4082"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-10-29T15:40:11Z",
    "nvd_published_at" : "2025-10-28T21:15:37Z"
  }
}