---
cve: "CVE-2026-63188"
severity: "HIGH"
cvss: 8.7
epss: "44%"
vendor: "logto-io"
kev: false
exploited: false
published: "2026-08-19 20:17:20"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T00:31:07+02:00"
---

# CVE-2026-63188

> 8.7 HIGH · 🧪 PoC

## Beschreibung

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. Prior to 0.3.9, the Logto Tunnel npm package enabled createStaticFileProxy from packages/tunnel/src/commands/tunnel/index.ts and passed request.url from static asset requests through packages/tunnel/src/commands/tunnel/utils.ts using path.join(staticPath, request.url) and then fs.open(requestPath, "r") without URL normalization or a containment check. When --experience-path was enabled and the tunnel port was reachable, an unauthenticated requester could send a path containing ../ to createStaticFileProxy and read files outside the configured static directory that were readable by the logto-tunnel process. The service used server.listen(port), which could expose the tunnel to other hosts depending on the platform and deployment. This issue is fixed in version 0.3.9.

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 5686815955534f803d3d50738259efd0f741e62c (Commit)

## Referenzen

- <https://github.com/logto-io/logto/security/advisories/GHSA-rxjr-6c9q-h67x>
- <https://github.com/logto-io/logto/pull/9113>
- <https://github.com/logto-io/logto/commit/5686815955534f803d3d50738259efd0f741e62c>
- <https://github.com/logto-io/logto/releases/tag/@logto/tunnel@0.3.9>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-63188) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_