CVE-2026-85788 Incomplete list of disallowed inputs in awslabs mysql-mcp-server
Attackers can bypass read-only restrictions in the MySQL MCP Server to perform file read and write operations via SQL inline comments.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-85788?
CVE-2026-85788 is a medium-severity vulnerability in AWS Labs MySQL MCP Server, published on 9 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Incomplete list of disallowed inputs in the mutable SQL detector component in Amazon awslabs mysql-mcp-server might allow context-dependent actors to bypass the read-only enforcement gate and reach file-read and file-write SQL sinks via SQL inline comments that the regex engine does not treat as whitespace.
To remediate this issue, users should upgrade to version 1.0.23.
Weakness: CWE-184
Which versions are affected by CVE-2026-85788?
How do I fix CVE-2026-85788?
No fix has been published for CVE-2026-85788 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-85788 being exploited?
There is no known exploitation of CVE-2026-85788 in the wild and no public exploit code.