Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-08-17 05:38

Modified

2026-08-17 06:10

Summary

Unauthenticated denial of service via unbounded external gRPC connection acceptance

Details

Consul Community Edition and Consul Enterprise 1.13.0 through 2.0.2 are vulnerable to an unauthenticated denial of service through unbounded connection acceptance on the external gRPC listeners. A remote attacker may exhaust agent file descriptors, goroutines, and memory by opening many incomplete connections, potentially preventing legitimate clients from connecting. This vulnerability, CVE-2026-15972, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "consul",
        "purl": "pkg:bitnami/consul"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.13.0"
            },
            {
              "fixed": "2.0.3"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-15972"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:hashicorp:consul:*:*:*:*:enterprise:*:*:*",
      "cpe:2.3:a:hashicorp:consul:*:*:*:*:community:go:*:*"
    ],
    "severity": "High"
  },
  "details": "Consul Community Edition and Consul Enterprise 1.13.0 through 2.0.2 are vulnerable to an unauthenticated denial of service through unbounded connection acceptance on the external gRPC listeners. A remote attacker may exhaust agent file descriptors, goroutines, and memory by opening many incomplete connections, potentially preventing legitimate clients from connecting. This vulnerability, CVE-2026-15972, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.",
  "id": "BIT-consul-2026-15972",
  "modified": "2026-08-17T06:10:32.268Z",
  "published": "2026-08-17T05:38:03.657Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://discuss.hashicorp.com/t/hcsec-2026-25-multiple-vulnerabilities-impacting-hashicorp-consul/77629"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-15972"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Unauthenticated denial of service via unbounded external gRPC connection acceptance"
}

CVE-2026-15972 (GCVE-0-2026-15972)

Vulnerability from cvelistv5 – Published: 2026-08-07 19:20 – Updated: 2026-08-10 18:24

Title

Unauthenticated denial of service via unbounded external gRPC connection acceptance

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-10 17:39 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

HashiCorp

References

1 reference

URL	Tags
https://discuss.hashicorp.com/t/hcsec-2026-25-mul…

Impacted products

2 products

Vendor	Product	Version
HashiCorp	Consul	Affected: 1.13.0 , < 2.0.3 (semver)
HashiCorp	Consul Enterprise	Affected: 1.13.0 , < 2.0.3 (semver)

Credits

This issue was reported by Erichen.

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
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        "metrics": [
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            "other": {
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                "id": "CVE-2026-15972",
                "options": [
                  {
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                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-10T17:39:56.729163Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-10T18:24:14.625Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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          "repo": "https://github.com/hashicorp/consul",
          "vendor": "HashiCorp",
          "versions": [
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              "status": "affected",
              "version": "1.13.0",
              "versionType": "semver"
            }
          ]
        },
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          "vendor": "HashiCorp",
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            {
              "changes": [
                {
                  "at": "1.21.17",
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                },
                {
                  "at": "1.22.11",
                  "status": "unaffected"
                }
              ],
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          ]
        }
      ],
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      "impacts": [
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      },
      "references": [
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        }
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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Vulnerability from bitnami_vulndb

CVE-2026-15972 (GCVE-0-2026-15972)

Tags

Sightings

Nomenclature