{"id":"CVE-2026-66902","aliases":["EUVD-2026-52921","GHSA-vjmh-7f4c-cx88"],"status":"published","title":"Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call","description":"Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call.\n\nThe Pluggable subclass reads credential_source.executable.command from the credentials JSON and runs it as `system($command)`, a single argument call that passes the whole string to /bin/sh -c. The executable's environment_variables map from the same JSON is copied into %ENV first. No opt-in gate guards the call. make_creds selects the Pluggable subclass whenever credential_source.executable is present, so the path is reached from the standard Application Default Credentials flow, including a \"type\": \"external_account\" configuration read from the file named by GOOGLE_APPLICATION_CREDENTIALS. Configurations without credential_source.executable do not select this subclass and do not reach the call.\n\nAny caller that builds credentials from a configuration it does not fully control runs the embedded command with the privileges of the application process.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-09","score":0.00702,"percentile":0.53529,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-78","CWE-829"],"published":"2026-08-04T20:49:43Z","modified":"2026-10-28T02:30:26Z","products":[{"vendor":"cjcollier","product":"google::auth"}],"references":[{"url":"https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/c95c77e70bec94f17e239d88050f843ea1cade95.patch","tags":["patch","fix"]},{"url":"https://metacpan.org/release/CJCOLLIER/Google-Auth-0.06/diff/CJCOLLIER/Google-Auth-0.05","tags":["web"]},{"url":"http://www.openwall.com/lists/oss-security/2026/08/04/35","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66902","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vjmh-7f4c-cx88"},{"url":"https://cpan.org/modules","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66902.json","tags":["advisory"]},{"url":"https://github.com/GoogleCloudPlatform/google-auth-library-perl","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-66902","title":"Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call","description":"Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call.\n\nThe Pluggable subclass reads credential_source.executable.command from the credentials JSON and runs it as `system($command)`, a single argument call that passes the whole string to /bin/sh -c. The executable's environment_variables map from the same JSON is copied into %ENV first. No opt-in gate guards the call. make_creds selects the Pluggable subclass whenever credential_source.executable is present, so the path is reached from the standard Application Default Credentials flow, including a \"type\": \"external_account\" configuration read from the file named by GOOGLE_APPLICATION_CREDENTIALS. Configurations without credential_source.executable do not select this subclass and do not reach the call.\n\nAny caller that builds credentials from a configuration it does not fully control runs the embedded command with the privileges of the application process.","status":"published","published":"2026-08-04T20:49:43.171Z","modified":"2026-08-05T19:27:48.767Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-78","CWE-829"],"updated_at":"2026-11-02T14:20:12.939084Z"}],"euvd":[{"id":"EUVD-2026-52921","description":"Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call.\n\nThe Pluggable subclass reads credential_source.executable.command from the credentials JSON and runs it as `system($command)`, a single argument call that passes the whole string to /bin/sh -c. The executable's environment_variables map from the same JSON is copied into %ENV first. No opt-in gate guards the call. make_creds selects the Pluggable subclass whenever credential_source.executable is present, so the path is reached from the standard Application Default Credentials flow, including a \"type\": \"external_account\" configuration read from the file named by GOOGLE_APPLICATION_CREDENTIALS. Configurations without credential_source.executable do not select this subclass and do not reach the call.\n\nAny caller that builds credentials from a configuration it does not fully control runs the embedded command with the privileges of the application process.","status":"published","published":"2026-08-04T20:49:43Z","modified":"2026-08-05T19:27:48Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:02:09.520152Z"}],"ghsa":[{"id":"GHSA-vjmh-7f4c-cx88","title":"Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials...","description":"Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call.\n\nThe Pluggable subclass reads credential_source.executable.command from the credentials JSON and runs it as `system($command)`, a single argument call that passes the whole string to /bin/sh -c. The executable's environment_variables map from the same JSON is copied into %ENV first. No opt-in gate guards the call. make_creds selects the Pluggable subclass whenever credential_source.executable is present, so the path is reached from the standard Application Default Credentials flow, including a \"type\": \"external_account\" configuration read from the file named by GOOGLE_APPLICATION_CREDENTIALS. Configurations without credential_source.executable do not select this subclass and do not reach the call.\n\nAny caller that builds credentials from a configuration it does not fully control runs the embedded command with the privileges of the application process.","status":"published","published":"2026-08-04T21:30:31Z","modified":"2026-08-05T21:32:37Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:10:08.59251Z"}],"nvd":[{"id":"CVE-2026-66902","description":"Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call.\n\nThe Pluggable subclass reads credential_source.executable.command from the credentials JSON and runs it as `system($command)`, a single argument call that passes the whole string to /bin/sh -c. The executable's environment_variables map from the same JSON is copied into %ENV first. No opt-in gate guards the call. make_creds selects the Pluggable subclass whenever credential_source.executable is present, so the path is reached from the standard Application Default Credentials flow, including a \"type\": \"external_account\" configuration read from the file named by GOOGLE_APPLICATION_CREDENTIALS. Configurations without credential_source.executable do not select this subclass and do not reach the call.\n\nAny caller that builds credentials from a configuration it does not fully control runs the embedded command with the privileges of the application process.","status":"published","published":"2026-08-04T21:16:37.253Z","modified":"2026-10-24T16:10:00.153Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-78","CWE-829"],"updated_at":"2026-11-02T14:12:34.643497Z"}],"osv":[{"id":"CVE-2026-66902","title":"Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call","description":"Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call.\n\nThe Pluggable subclass reads credential_source.executable.command from the credentials JSON and runs it as `system($command)`, a single argument call that passes the whole string to /bin/sh -c. The executable's environment_variables map from the same JSON is copied into %ENV first. No opt-in gate guards the call. make_creds selects the Pluggable subclass whenever credential_source.executable is present, so the path is reached from the standard Application Default Credentials flow, including a \"type\": \"external_account\" configuration read from the file named by GOOGLE_APPLICATION_CREDENTIALS. Configurations without credential_source.executable do not select this subclass and do not reach the call.\n\nAny caller that builds credentials from a configuration it does not fully control runs the embedded command with the privileges of the application process.","status":"published","published":"2026-08-04T20:49:43.171Z","modified":"2026-10-28T02:30:26.934886882Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-78","CWE-829"],"updated_at":"2026-11-02T15:45:14.46177Z"}]}}