CVE-2026-66902 (GCVE-0-2026-66902)
Vulnerability from cvelistv5 – Published: 2026-08-04 20:49 – Updated: 2026-08-05 19:27
VLAI
EPSS
VEX
Title
Google::Auth versions before 0.06 for Perl run a command named in an external_account credentials JSON via an ungated system call
Summary
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.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 19:27 UTC
CWE
Assigner
CPANSec
CNA
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| CJCOLLIER | Google::Auth |
Affected:
0 , < 0.06
(custom)
|
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