CVE-2026-66901

The full cvelistV5 record. Download as CVE-2026-66901.json.

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-08-04T22:24:40.149Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/08/04/34"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Google-Auth",
          "product": "Google::Auth",
          "programFiles": [
            "lib/Google/Auth/ExternalAccountCredentials.pm",
            "lib/Google/Auth/ServiceAccountCredentials.pm",
            "lib/Google/Auth/UserRefreshCredentials.pm",
            "lib/Google/Auth/ImpersonatedServiceAccountCredentials.pm"
          ],
          "programRoutines": [
            {
              "name": "Google::Auth::ExternalAccountCredentials::retrieve_subject_token"
            },
            {
              "name": "Google::Auth::ExternalAccountCredentials::fetch_access_token"
            },
            {
              "name": "Google::Auth::ServiceAccountCredentials::fetch_access_token"
            },
            {
              "name": "Google::Auth::UserRefreshCredentials::fetch_access_token"
            },
            {
              "name": "Google::Auth::ImpersonatedServiceAccountCredentials::fetch_access_token"
            }
          ],
          "repo": "https://github.com/GoogleCloudPlatform/google-auth-library-perl",
          "vendor": "CJCOLLIER",
          "versions": [
            {
              "lessThan": "0.09",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Google::Auth versions before 0.09 for Perl allow server side request forgery and credential exfiltration via unvalidated URLs taken from the credentials JSON.\n\nThe URLs the library requests are read from the credentials JSON, and their hosts were not checked against the universe domain before the request. For an external_account configuration, retrieve_subject_token fetched credential_source.url with headers from the same JSON, and fetch_access_token posted the subject token to token_url, then sent the STS access token it received to service_account_impersonation_url in an Authorization: Bearer header. The authorized_user, impersonated_service_account and service_account configurations posted the client secret and refresh token, the source access token, and a signed JWT assertion to their own JSON-supplied token_uri or impersonation URL.\n\nAny caller that builds credentials from a configuration it does not fully control issues those requests from the application's network position, reaching hosts the configuration names, including internal services and link-local metadata endpoints, and hands them the credentials each request carries. The service_account assertion is bound to aud, so it is not replayable against Google.\n\nVersion 0.06 added a _validate_url host check to the external_account class, keyed on a universe_domain read from the same credentials JSON. Version 0.07 gated a JSON-supplied universe domain behind GOOGLE_EXTERNAL_ACCOUNT_ALLOW_CUSTOM_UNIVERSES=1, deriving the pin flag from arguments that an earlier BUILDARGS pass had already merged on the make_creds path. Version 0.08 passed the pin decision through as an explicit constructor argument and moved _validate_url to Google::Auth::Credentials, adding the call to UserRefreshCredentials and ImpersonatedServiceAccountCredentials, and 0.09 added it to ServiceAccountCredentials."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918 Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-201",
              "description": "CWE-201 Insertion of Sensitive Information Into Sent Data",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-04T20:49:27.643Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/c95c77e70bec94f17e239d88050f843ea1cade95.patch"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/cd42bdef53afcc4531161e85e91d0d5997e01324.patch"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/9b5157062acc605ca9e6c507b910587f4829ce9e.patch"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/cbbb07804e3f8cc7cf9638ecc9c2097d80a9ef50.patch"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://metacpan.org/release/CJCOLLIER/Google-Auth-0.09/changes"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to Google-Auth 0.09 or later, which validates each URL host against googleapis.com or a universe domain pinned by the application before the request."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-07-28T00:00:00.000Z",
          "value": "Version 0.06 released with a partial fix."
        },
        {
          "lang": "en",
          "time": "2026-08-02T00:00:00.000Z",
          "value": "Version 0.08 released, extending the fix to two further credential classes."
        },
        {
          "lang": "en",
          "time": "2026-08-03T00:00:00.000Z",
          "value": "Version 0.09 released with the complete fix."
        }
      ],
      "title": "Google::Auth versions before 0.09 for Perl allow server side request forgery and credential exfiltration via unvalidated URLs taken from the credentials JSON",
      "workarounds": [
        {
          "lang": "en",
          "value": "For deployments that cannot upgrade to 0.09, ensure that every credentials configuration reaching the Application Default Credentials flow comes from a trusted source."
        }
      ],
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-66901",
    "datePublished": "2026-08-04T20:49:27.643Z",
    "dateReserved": "2026-07-28T08:28:27.249Z",
    "dateUpdated": "2026-08-04T22:24:40.149Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}