CVE WatchAug 4, 2026

CVE-2026-66902

Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call. The Plug

CVSS

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No CVSS

EPSS

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KEV

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Exploit Today

0-100

Published: Aug 4, 2026 · Last modified: Aug 4, 2026 · CWE-78 · CWE-829

EPSS · 30d

Not enough EPSS history yet.

Technical description

Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call. The 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. Any caller that builds credentials from a configuration it does not fully control runs the embedded command with the privileges of the application process.

Official references

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