CVE-2026-10277 j3k0 mcp-google-workspace MCP Gmail Tool gmail.ts saveToDisk access control
Attackers can bypass access controls in the saveToDisk function to read or modify Gmail data remotely.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-10277?
CVE-2026-10277 is a medium-severity missing authorization vulnerability in j3k0 mcp-google-workspace, published on 1 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-10277?
How do I fix CVE-2026-10277?
No fix has been published for CVE-2026-10277 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-10277 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-10277 exists.
Sources
Also known as GHSA-37j4-5858-49mq.