01 Record

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

CriticalPUBLISHEDCNA: CPANSec

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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02 Description

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

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.70% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 52.7% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Deferred. NVD last modified this record on 2026-10-24.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-08-04 20:49Z2 MO AGO

Last updated

2026-08-05 19:27Z2 MO AGO

Reserved

2026-07-28

Assigning CNA

CPANSec

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base
CWE-829Inclusion of Functionality from Untrusted Control SphereBase

Data version

5.2

Document digest

b021dcc844a740cdbb4bc9786c4acc95eec0a1f05891b725fe4f3a47e9e0e259

05 Affected products

VendorProductVersionsPlatforms

CJCOLLIERGoogle::Auth0 to < 0.06—

06 References

07 Remediation

Upgrade to Google-Auth 0.06 or later, which throws unless the environment variable GOOGLE_EXTERNAL_ACCOUNT_ALLOW_EXECUTABLES is set to 1.