Vulnerability-Lookup

GHSA-8R5M-3F66-QPR3

Vulnerability from github – Published: 2026-04-17 06:31 – Updated: 2026-04-18 00:53

Summary

HashiCorp Vault has Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNS

Details

Vault’s PKI engine’s ACME validation did not reject local targets when issuing http-01 and tls-alpn-01 challenges. This may lead to these requests being sent to local network targets, potentially leading to information disclosure. Fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0, 1.21.5, 1.20.10, and 1.19.16.

Severity ?

5.3 (Medium)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/hashicorp/vault"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.14.0"
            },
            {
              "last_affected": "1.21.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-5052"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-18T00:53:25Z",
    "nvd_published_at": "2026-04-17T04:16:12Z",
    "severity": "MODERATE"
  },
  "details": "Vault\u2019s PKI engine\u2019s ACME validation did not reject local targets when issuing http-01 and tls-alpn-01 challenges. This may lead to these requests being sent to local network targets, potentially leading to information disclosure. Fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0, 1.21.5, 1.20.10, and 1.19.16.",
  "id": "GHSA-8r5m-3f66-qpr3",
  "modified": "2026-04-18T00:53:25Z",
  "published": "2026-04-17T06:31:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5052"
    },
    {
      "type": "WEB",
      "url": "https://discuss.hashicorp.com/t/hcsec-2026-06-vault-vulnerable-to-server-side-request-forgery-in-acme-challenge-validation-via-attacker-controlled-dns/77343"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/hashicorp/vault"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "HashiCorp Vault has Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNS"
}

CVE-2026-5052 (GCVE-0-2026-5052)

Vulnerability from cvelistv5 – Published: 2026-04-17 02:55 – Updated: 2026-04-17 17:57

Title

Vault Vulnerable to Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNS

Summary

Severity ?

5.3 (Medium)


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

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

HashiCorp

References

URL

Tags

https://discuss.hashicorp.com/t/hcsec-2026-06-vau…

Impacted products

Vendor

Product

Version

HashiCorp

Vault

Affected: 1.15.0 , < 2.0.0 (semver)

HashiCorp

Vault Enterprise

Affected: 1.15.0 , < 2.0.0 (semver)

Credits

This issue was independently identified and reported by Oleh Konko of 1seal, as well as Vipin Chaudhary.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-5052",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-17T13:19:57.168697Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-17T13:20:07.590Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "platforms": [
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            "32 bit",
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          ],
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        {
          "defaultStatus": "unaffected",
          "platforms": [
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            "ARM",
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          ],
          "product": "Vault Enterprise",
          "repo": "https://github.com/hashicorp/vault",
          "vendor": "HashiCorp",
          "versions": [
            {
              "changes": [
                {
                  "at": "1.19.16",
                  "status": "unaffected"
                },
                {
                  "at": "1.20.10",
                  "status": "unaffected"
                },
                {
                  "at": "1.21.5",
                  "status": "unaffected"
                }
              ],
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              "versionType": "semver"
            }
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        }
      ],
      "credits": [
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            }
          ],
          "value": "Vault\u2019s PKI engine\u2019s ACME validation did not reject local targets when issuing http-01 and tls-alpn-01 challenges. This may lead to these requests being sent to local network targets, potentially leading to information disclosure. Fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0, 1.21.5, 1.20.10, and 1.19.16."
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      ],
      "impacts": [
        {
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          "descriptions": [
            {
              "lang": "en",
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      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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          "scenarios": [
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      "problemTypes": [
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              "type": "CWE"
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          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-17T17:57:55.377Z",
        "orgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc",
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      },
      "references": [
        {
          "url": "https://discuss.hashicorp.com/t/hcsec-2026-06-vault-vulnerable-to-server-side-request-forgery-in-acme-challenge-validation-via-attacker-controlled-dns/77343"
        }
      ],
      "source": {
        "advisory": "HCSEC-2026-06",
        "discovery": "EXTERNAL"
      },
      "title": "Vault Vulnerable to Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNS"
    }
  },
  "cveMetadata": {
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    "datePublished": "2026-04-17T02:55:25.080Z",
    "dateReserved": "2026-03-27T17:50:20.727Z",
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    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-8R5M-3F66-QPR3

CVE-2026-5052 (GCVE-0-2026-5052)

Tags

Sightings

Nomenclature