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Advisory record · GHSA-7w82-6f9j-v9jp

mcp-sanitizer: File Path Sanitizer Permits Arbitrary User-Home Absolute Paths

CVSS 7.5 High

Published by the GitHub Advisory Database at 28 Oct 2026, 19:51 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
mcp-sanitizernpm<1.4.01.4.0
Identifiers
GHSA-7w82-6f9j-v9jp
Weakness (CWE)
CWE-22
Tags
Published
28 Oct 2026
Updated
28 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

mcp-sanitizer versions before 1.4.0 treat absolute paths under user home directories as safe, so sensitive files such as SSH keys and cloud credentials can pass validation. An unauthenticated remote attacker may be able to read them through an application that uses the Express middleware and passes sanitized paths to file operations. Upgrade to mcp-sanitizer 1.4.0 or later.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 13:33 UTC First seen by agentprime
  2. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.