{"id":"CVE-2026-66902","published":"2026-08-04T21:16:37.253","lastModified":"2026-08-05T20:17:13.593","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.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-78","CWE-829"],"vendors":[],"products":[],"references":[{"url":"https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/c95c77e70bec94f17e239d88050f843ea1cade95.patch","tags":[]},{"url":"https://metacpan.org/release/CJCOLLIER/Google-Auth-0.06/diff/CJCOLLIER/Google-Auth-0.05","tags":[]},{"url":"http://www.openwall.com/lists/oss-security/2026/08/04/35","tags":[]}],"exploitRefs":[{"url":"https://github.com/GoogleCloudPlatform/google-auth-library-perl/commit/c95c77e70bec94f17e239d88050f843ea1cade95.patch","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows an attacker to execute arbitrary commands on the system where the vulnerable Google::Auth module is running, due to the lack of proper input validation and control over the command execution.","exploitability":"Exploitation is relatively straightforward as the command is executed without any gate or validation, requiring only control over the external_account credentials JSON.","blast_radius":"If exploited, the impact could be severe, as it allows full system command execution with the privileges of the application process, potentially leading to complete system compromise.","remediation":"Upgrade to Google::Auth version 0.06 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","command-execution","auth-bypass"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-28T09:01:29.812Z"}}