Vulnerability-Lookup

GHSA-72GW-FMMR-C4R4

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

Summary

HashiCorp Vault May Expose Tokens to Auth Plugins Due to Incorrect Header Sanitization

Details

If a Vault auth mount is configured to pass through the "Authorization" header, and the "Authorization" header is used to authenticate to Vault, Vault forwarded the Vault token to the auth plugin backend. Fixed in 2.0.0, 1.21.5, 1.20.10, and 1.19.16.

Severity ?

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/hashicorp/vault"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.11.2"
            },
            {
              "last_affected": "1.21.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-4525"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-201"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-18T00:53:01Z",
    "nvd_published_at": "2026-04-17T04:16:09Z",
    "severity": "HIGH"
  },
  "details": "If a Vault auth mount is configured to pass through the \"Authorization\" header, and the \"Authorization\" header is used to authenticate to Vault, Vault forwarded the Vault token to the auth plugin backend. Fixed in 2.0.0, 1.21.5, 1.20.10, and 1.19.16.",
  "id": "GHSA-72gw-fmmr-c4r4",
  "modified": "2026-04-18T00:53:01Z",
  "published": "2026-04-17T06:31:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4525"
    },
    {
      "type": "WEB",
      "url": "https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/hashicorp/vault"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "HashiCorp Vault May Expose Tokens to Auth Plugins Due to Incorrect Header Sanitization"
}

CVE-2026-4525 (GCVE-0-2026-4525)

Vulnerability from cvelistv5 – Published: 2026-04-17 03:00 – Updated: 2026-04-17 17:22

Title

Vault Token Leaked to Backends via Authorization: Bearer Passthrough Header

Summary

Severity ?

7.5 (High)


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

CWE

CWE-201 - Insertion of Sensitive Information Into Sent Data

Assigner

HashiCorp

References

URL

Tags

https://discuss.hashicorp.com/t/hcsec-2026-07-vau…

Impacted products

Vendor

Product

Version

HashiCorp

Vault

Affected: 0.11.2 , < 2.0.0 (semver)

HashiCorp

Vault Enterprise

Affected: 0.11.2 , < 2.0.0 (semver)

Credits

This issue was identified and reported by Oleh Konko of 1seal.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-4525",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-17T13:19:26.452614Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-17T13:19:32.463Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "64 bit",
            "32 bit",
            "x86",
            "ARM",
            "MacOS",
            "Windows",
            "Linux"
          ],
          "product": "Vault",
          "repo": "https://github.com/hashicorp/vault",
          "vendor": "HashiCorp",
          "versions": [
            {
              "lessThan": "2.0.0",
              "status": "affected",
              "version": "0.11.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "64 bit",
            "32 bit",
            "x86",
            "ARM",
            "MacOS",
            "Windows",
            "Linux"
          ],
          "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"
                }
              ],
              "lessThan": "2.0.0",
              "status": "affected",
              "version": "0.11.2",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "This issue was identified and reported by Oleh Konko of 1seal."
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eIf a Vault auth mount is configured to pass through the \"Authorization\" header, and the \"Authorization\" header is used to authenticate to Vault, Vault forwarded the Vault token to the auth plugin backend. Fixed in 2.0.0, 1.21.5, 1.20.10, and 1.19.16.\u003c/p\u003e\u003cbr/\u003e"
            }
          ],
          "value": "If a Vault auth mount is configured to pass through the \"Authorization\" header, and the \"Authorization\" header is used to authenticate to Vault, Vault forwarded the Vault token to the auth plugin backend. Fixed in 2.0.0, 1.21.5, 1.20.10, and 1.19.16."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-118",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-118: Collect and Analyze Information"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-201",
              "description": "CWE-201: Insertion of Sensitive Information Into Sent Data",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-17T17:22:41.255Z",
        "orgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc",
        "shortName": "HashiCorp"
      },
      "references": [
        {
          "url": "https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344"
        }
      ],
      "source": {
        "advisory": "HCSEC-2026-08",
        "discovery": "EXTERNAL"
      },
      "title": "Vault Token Leaked to Backends via Authorization: Bearer Passthrough Header"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc",
    "assignerShortName": "HashiCorp",
    "cveId": "CVE-2026-4525",
    "datePublished": "2026-04-17T03:00:47.561Z",
    "dateReserved": "2026-03-20T17:47:40.835Z",
    "dateUpdated": "2026-04-17T17:22:41.255Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-72GW-FMMR-C4R4

CVE-2026-4525 (GCVE-0-2026-4525)

Tags

Sightings

Nomenclature