---
title: "CVE-2026-0755: gemini-mcp-tool vulnerable to OS command injection and @file exfiltration via prompt quoting (CVE-2026-0755)"
url: https://erroneo.us/security/cve/CVE-2026-0755/
description: "CVE-2026-0755 (gemini-mcp-tool (npm)): gemini-mcp-tool execAsync Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-01-23
date_modified: 2026-06-18
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-0755"
kev: false
cvss: 9.8
epss: 0.0342
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-0755: gemini-mcp-tool vulnerable to OS command injection and @file exfiltration via prompt quoting (CVE-2026-0755)

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 3.4% , percentile 89: FIRST’s model estimates a 3.4% chance of exploitation activity in the next 30 days, higher than 89% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes gemini-mcp-tool (npm) >= 1.1.2, < 1.1.6, fixed in 1.1.6 . Check your lockfile, including transitive dependencies.

## What it is

gemini-mcp-tool execAsync Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of gemini-mcp-tool. Authentication is not required to exploit this vulnerability. The specific flaw exists within the implementation of the execAsync method. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-27783.

## Affected packages

- npm `gemini-mcp-tool` >= 1.1.2, < 1.1.6 → fixed: 1.1.6

## Affected products (CVE record)

- Gemini MCP Tool gemini-mcp-tool: 1.1.2

## Severity

- zdi CVSS 3.0: 9.8 `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 3.42% probability of exploitation activity in the next 30 days; percentile 89.

## Sources

- [GitHub Advisory GHSA-4h5r-5jm8-jxjm](https://github.com/advisories/GHSA-4h5r-5jm8-jxjm)
- [CVE.org record CVE-2026-0755](https://www.cve.org/CVERecord?id=CVE-2026-0755)
- [NVD entry CVE-2026-0755](https://nvd.nist.gov/vuln/detail/CVE-2026-0755)
- [ZDI-26-021](https://www.zerodayinitiative.com/advisories/ZDI-26-021/)
- [github.com](https://github.com/jamubc/gemini-mcp-tool/security/advisories/GHSA-4h5r-5jm8-jxjm)

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Source page: https://erroneo.us/security/cve/CVE-2026-0755/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt