{"id":"CVE-2026-66902","summary":"Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call","details":"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.","modified":"2026-08-07T03:30:35.542266627Z","published":"2026-08-04T20:49:43.171Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66902.json","unresolved_ranges":[{"extracted_events":[{"fixed":"0.06"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"fixed":"0.06"}],"source":"DESCRIPTION"}],"cna_assigner":"CPANSec","cwe_ids":["CWE-78","CWE-829"]},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/08/04/35"},{"type":"WEB","url":"https://cpan.org/modules"},{"type":"WEB","url":"https://metacpan.org/release/CJCOLLIER/Google-Auth-0.06/diff/CJCOLLIER/Google-Auth-0.05"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66902.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66902"},{"type":"FIX","url":"https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/c95c77e70bec94f17e239d88050f843ea1cade95.patch"},{"type":"PACKAGE","url":"https://github.com/GoogleCloudPlatform/google-auth-library-perl"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/googlecloudplatform/google-auth-library-perl","events":[{"introduced":"0"},{"fixed":"c95c77e70bec94f17e239d88050f843ea1cade95"}],"database_specific":{"source":"REFERENCES"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66902.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}