GHSA-7w82-6f9j-v9jp: mcp-sanitizer: File Path Sanitizer Permits Arbitrary User-Home Absolute Paths

The GitHub advisory says mcp-sanitizer before version 1.4.0 treats any path under /home/ or /Users/ as allowed, so paths to files such as SSH (Secure Shell) private keys and cloud credentials pass its file path check, and that a reproduction read a simulated SSH key and AWS (Amazon Web Services) credentials with a single HTTP (Hypertext Transfer Protocol) POST request.

The record

Kind

Vulnerability

Source record

GHSA-7w82-6f9j-v9jp: mcp-sanitizer: mcp-sanitizer: File Path Sanitizer Permits Arbitrary User-Home Absolute Paths (GitHub-reviewed advisory via OSV)

Record published

2026-10-28

Posted here

2026-10-29

World

Software agents · Enterprise work agents

Controls concerned

Least-privilege credential scoped to task C-E1; Hard domain restriction C-E2

Checked

Checked against its record on 2026-10-29 by a reader who did not draft it; report verification/reports/SIG-2026-10-29-008-2026-10-29.md.

A signal's controls are the ones its record points at, the exposure; a case's controls are the ones its records show were absent or failed, so the two can differ.

Corrections

Changes to what this signal says, with the reason. Every earlier version is kept.

• 2026-10-29: Summary. Independent read on 29 October 2026 (osv.dev record): the affected range is all versions before 1.4.0, fixed in 1.4.0; 1.3.3 is only the version the reproduction used.
  Show the change

  Before: The GitHub advisory says mcp-sanitizer version 1.3.3 treats any path under /home/ or /Users/ as allowed, so paths to files such as SSH (Secure Shell) private keys and cloud credentials pass its file path check, and that a reproduction read a simulated SSH key and AWS (Amazon Web Services) credentials with a single HTTP (Hypertext Transfer Protocol) POST request.

  After: The GitHub advisory says mcp-sanitizer before version 1.4.0 treats any path under /home/ or /Users/ as allowed, so paths to files such as SSH (Secure Shell) private keys and cloud credentials pass its file path check, and that a reproduction read a simulated SSH key and AWS (Amazon Web Services) credentials with a single HTTP (Hypertext Transfer Protocol) POST request.
• 2026-10-29: Title. Independent read on 29 October 2026: the package name was repeated; the advisory's summary is 'mcp-sanitizer: File Path Sanitizer Permits Arbitrary User-Home Absolute Paths'.
  Show the change

  Before: GHSA-7w82-6f9j-v9jp: mcp-sanitizer: mcp-sanitizer: File Path Sanitizer Permits Arbitrary User-Home Absolute Paths

  After: GHSA-7w82-6f9j-v9jp: mcp-sanitizer: File Path Sanitizer Permits Arbitrary User-Home Absolute Paths

What a signal is. A signal records what a primary record says; it assigns no fault. It is lighter than a case: one dated item from one record, tagged with the world, sector and controls it touches. It becomes a case when it meets the bar for one.

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Older: CVE-2026-118038: Progress Telerik Document Processing Libraries