# CVE-2026-81491: boxpositron with-context-mcp index.ts project_folder path traversal

> Remote attackers can exploit path traversal in with-context-mcp to read or modify files outside the intended directory.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Aug 2026
- **Updated:** 27 Aug 2026
- **Also known as:** GHSA-cfj4-56c7-w9x6

## What is CVE-2026-81491?

CVE-2026-81491 is a medium-severity path traversal vulnerability in boxpositron with-context-mcp, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw has been found in boxpositron with-context-mcp up to 3.0.7. This affects the function ingest_notes/teleport_notes/sync_notes/project_folder of the file src/index.ts. Executing a manipulation can lead to path traversal. It is possible to launch the attack remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-81491?


## How do I fix CVE-2026-81491?

No fix has been published for CVE-2026-81491 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-81491 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-81491 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-81491 and fix it if it is affected.

What it is: CVE-2026-81491 is a medium-severity path traversal vulnerability in boxpositron with-context-mcp, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-81491 exists.

Affected product: boxpositron with-context-mcp. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-81491/ (Markdown: https://insights.sbomify.com/CVE-2026-81491/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-81491
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-81491
- OSV: https://osv.dev/vulnerability/CVE-2026-81491

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-81491/
Summaries are generated and may contain mistakes; the official description above is the record.