# logto-tunnel serves files outside \`--experience-path\` via path traversal

Advisory record · `GHSA-rxjr-6c9q-h67x`

- **Identifiers:** `GHSA-rxjr-6c9q-h67x` · `CVE-2026-63188`
- **State:** Confirmed
- **Severity:** CVSS 8.7 High
- **Critical:** No
- **Weakness (CWE):** [CWE-22](https://cwe.mitre.org/data/definitions/22.html)
- **Tags:** [Path traversal](https://agentprime.io/advisories/tag/path-traversal.md)
- **Published:** 19 Aug 2026
- **Updated:** 5 Nov 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 19 Aug 2026, 20:24 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `@logto/tunnel` (npm): affected `<0.3.9`; fixed in `0.3.9`

## 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

- 8.7 High, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0054, the 45th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 19 Aug 2026, 20:24 UTC: [Confirmed by GitHub Advisory Database](https://github.com/advisories/GHSA-rxjr-6c9q-h67x)
- 5 Nov 2026, 17:45 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-rxjr-6c9q-h67x)

## Sources

- [GitHub Advisory Database: GHSA-rxjr-6c9q-h67x](https://github.com/advisories/GHSA-rxjr-6c9q-h67x)
- [OSV: GHSA-rxjr-6c9q-h67x](https://osv.dev/vulnerability/GHSA-rxjr-6c9q-h67x)
- <https://github.com/logto-io/logto/security/advisories/GHSA-rxjr-6c9q-h67x>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-63188>
- <https://github.com/logto-io/logto/pull/9113>
- <https://github.com/logto-io/logto/commit/5686815955534f803d3d50738259efd0f741e62c>
- <https://github.com/logto-io/logto>
- <https://github.com/logto-io/logto/releases/tag/@logto/tunnel@0.3.9>

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.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-rxjr-6c9q-h67x>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-rxjr-6c9q-h67x/>. Everything for agents: <https://agentprime.io/llms.txt>.