Arbitrary Code Execution in Gemini CLI via Untrusted Local .env Files Overriding GEMINI_CLI_HOME

published 2026-09-10 59 d ago modified 2026-09-23 46 d ago also EUVD-2026-75326

cvss: 7.7; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits: 0; none known

A vulnerability in the Gemini CLI prior to version 0.39.1 allows attackers to achieve arbitrary code execution by tricking a victim into starting the CLI within an untrusted directory. The vulnerability is triggered via untrusted .env files overriding GEMINI_CLI_HOME to load malicious configuration files and bypass folder trust prompts.

Patch / fix

fixed in 1 links 1

Google Cloud Gemini CLI 0.39.1

github.com/google-gemini/gemini-cli/releases/tag/v0.39.1 release

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 59 d ago (2026-09-10)

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	7.7	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/U:Amber
CNA	4.0	7.7	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber

Affected products

Google Cloud Gemini CLI

Classification

Weakness

CWE-829 Inclusion of Functionality from Untrusted Control Sphere
CWE-15 External Control of System or Configuration Setting

References

Sources

CVE List CVE-2026-13745
NVD CVE-2026-13745

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary