CVE-2026-13745 PUBLISHED

Arbitrary Code Execution in Gemini CLI via Symlinked Environment Variables

Assigner: GoogleCloud
Reserved: 29.06.2026 Published: 10.09.2026 Updated: 10.09.2026

A vulnerability in the Gemini CLI and associated GitHub Action allowed an unprivileged attacker to achieve an arbitrary code execution in Gemini CLI via untrusted local .env files overriding GEMINI_CLI_HOME.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/U:Amber
CVSS Score: 9.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	Low
Attack Complexity	High	Integrity	High	Integrity	Low
Attack Requirements	None	Availability	High	Availability	Low
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	Google Cloud
Product	Gemini CLI
Versions	Default: unaffected affected from 0 to 0.39.1 (excl.)

Vendor	Google Cloud
Product	run-gemini-cli GitHub Action
Versions	Default: unaffected affected from 0 to 0.1.22 (excl.)

Solutions

Upgrade: Ensure you are using the latest version of gemini cli and follow the best practices guide https://github.com/google-github-actions/run-gemini-cli/blob/main/docs/trust-guidance.md
Configure Trust: Determine if your CI workflow operates on trusted or untrusted data. If the data is fully trusted, set GEMINI_TRUST_WORKSPACE: 'true' in your workflow.

Credits

Benjamin Faller, Redguard AG reporter

References

Problem Types

CWE-20 Improper input validation CWE
CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') CWE

Impacts

CAPEC-88 Command Injection