What is CVE-2026-10277?

CVE-2026-10277 is a medium-severity vulnerability in J3k0 Mcp-Google-Workspace, classified under Incorrect Privilege Assignment. CVSS score: 6.3/10. Published 2026-06-01.

How severe is CVE-2026-10277?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Privilege escalation in J3k0 Mcp-Google-Workspace

CVE-2026-10277

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.

Published 2026-06-01 · last modified 2026-07-22.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (18.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

J3k0 Mcp-Google-Workspace — versions 831790e7d5c2663325733d9f5579cc339a267c4c

Weakness classification (CWE)

References

vuldb.com/vuln/367570 (technical-description, vdb-entry)
vuldb.com/vuln/367570/cti (signature, permissions-required)
vuldb.com/cve/CVE-2026-10277 (third-party-advisory)
vuldb.com/submit/825416 (third-party-advisory)
github.com/j3k0/mcp-google-workspace/issues/19 (issue-tracking, exploit)
github.com/j3k0/mcp-google-workspace/pull/22 (issue-tracking, patch)
github.com/j3k0/mcp-google-workspace/commit/89c091ecf8b9f9c7291d1af0b1966e271f8… (patch)
github.com/j3k0/mcp-google-workspace/ (product)

Frequently asked questions

What is CVE-2026-10277?: CVE-2026-10277 is a medium-severity vulnerability in J3k0 Mcp-Google-Workspace, classified under Incorrect Privilege Assignment. CVSS score: 6.3/10. Published 2026-06-01.
How severe is CVE-2026-10277?: Medium severity. CVSS v3 base score is 6.3 out of 10.