Directory Traversal Affecting logto-1.39 package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published22 Aug 2026
- disclosed19 Aug 2026
Introduced: 19 Aug 2026
CVE-2026-63188 (opens in a new tab)How to fix?
There is no fixed version for Minimos:latest logto-1.39.
NVD Description
Note: Versions mentioned in the description apply only to the upstream logto-1.39 package and not the logto-1.39 package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
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.
References
- https://www.cve.org/CVERecord?id=CVE-2026-63188
- https://github.com/advisories/GHSA-rxjr-6c9q-h67x
- https://osv.dev/vulnerability/MINI-43c2-qm78-m77j
- https://osv.dev/vulnerability/CVE-2026-63188
- https://github.com/logto-io/logto/commit/5686815955534f803d3d50738259efd0f741e62c
- https://github.com/logto-io/logto/pull/9113
- https://github.com/logto-io/logto/releases/tag/@logto/tunnel@0.3.9
- https://github.com/logto-io/logto/security/advisories/GHSA-rxjr-6c9q-h67x