CVE-2026-63188

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (43rd percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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 v3
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
54
EG Risk 54/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity87% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 19, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 19, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit.
github_commit Patch Available

commit 568681595553 (logto-io/logto)

Patch available: logto-io/logto v1.41.0 (contains commit 568681595553)

https://github.com/logto-io/logto/commit/5686815955534f803d3d50738259efd0f741e62c
github_pr Patch Available

fix(tunnel): prevent static path traversal

Patch available: logto-io/logto v1.41.0 (PR #9113 merged 2026-06-30)

https://github.com/logto-io/logto/pull/9113
github Patch Available🟡 PoC Available

logto-tunnel serves files outside --experience-path via path traversal · Advisory · logto-io/logto · GitHub

https://github.com/logto-io/logto/security/advisories/GHSA-rxjr-6c9q-h67x

Vendor Advisories for CVE-2026-63188(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
@logto/tunnel—
  • every version up to 0.3.9: fixed in 0.3.9
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-05 10:05 UTCEG score recompute
  2. 2026-10-04 23:22 UTCEPSS rescore
  3. 2026-10-03 16:54 UTCEG score recompute
  4. 2026-10-03 14:26 UTCEPSS rescore
  5. 2026-10-03 01:37 UTCEG score recompute
  6. 2026-10-02 17:56 UTCEPSS rescore
  7. 2026-10-01 22:45 UTCEG score recompute
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-09-30 21:19 UTCEG score recompute
  10. 2026-09-30 15:03 UTCEPSS rescore
  11. 2026-09-30 08:38 UTCEG score recompute
  12. 2026-09-28 21:41 UTCEG score recompute
  13. 2026-09-28 13:51 UTCEPSS rescore
  14. 2026-09-27 18:40 UTCEG score recompute
  15. 2026-09-27 05:59 UTCEG score recompute
  16. 2026-09-26 15:59 UTCEPSS rescore
  17. 2026-09-25 00:48 UTCEG score recompute
  18. 2026-09-23 21:19 UTCEG score recompute
  19. 2026-09-23 17:54 UTCEPSS rescore
  20. 2026-09-22 19:57 UTCEG score recompute
  21. 2026-09-22 07:14 UTCEG score recompute
  22. 2026-09-21 05:52 UTCEG score recompute
  23. 2026-09-20 20:16 UTCEPSS rescore
  24. 2026-09-20 03:02 UTCEG score recompute
  25. 2026-09-19 01:38 UTCEG score recompute
Show 56 more
  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 00:12 UTCEG score recompute
  3. 2026-09-16 22:45 UTCEG score recompute
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 09:51 UTCEG score recompute
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-15 07:55 UTCEG score recompute
  8. 2026-09-14 05:09 UTCEG score recompute
  9. 2026-09-12 15:05 UTCEG score recompute
  10. 2026-09-12 02:23 UTCEG score recompute
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-11 13:41 UTCEG score recompute
  13. 2026-09-11 09:37 UTCEPSS rescore
  14. 2026-09-10 12:18 UTCEG score recompute
  15. 2026-09-09 02:31 UTCEG score recompute
  16. 2026-09-08 22:01 UTCEPSS rescore
  17. 2026-09-07 17:47 UTCEG score recompute
  18. 2026-09-07 16:01 UTCEPSS rescore
  19. 2026-09-06 16:22 UTCEG score recompute
  20. 2026-09-06 13:47 UTCEPSS rescore
  21. 2026-09-06 03:41 UTCEG score recompute
  22. 2026-09-05 15:31 UTCEPSS rescore
  23. 2026-09-05 02:15 UTCEG score recompute
  24. 2026-09-04 13:34 UTCEG score recompute
  25. 2026-09-04 05:07 UTCEPSS rescore
  26. 2026-09-02 22:51 UTCEG score recompute
  27. 2026-09-02 14:12 UTCEPSS rescore
  28. 2026-09-01 21:17 UTCEG score recompute
  29. 2026-09-01 13:54 UTCEPSS rescore
  30. 2026-09-01 08:36 UTCEG score recompute
  31. 2026-09-01 04:40 UTCEPSS rescore
  32. 2026-08-31 04:33 UTCEG score recompute
  33. 2026-08-30 19:17 UTCEPSS rescore
  34. 2026-08-30 03:11 UTCEG score recompute
  35. 2026-08-30 01:22 UTCEPSS rescore
  36. 2026-08-29 01:47 UTCEG score recompute
  37. 2026-08-28 21:42 UTCEPSS rescore
  38. 2026-08-27 19:25 UTCEG score recompute
  39. 2026-08-27 14:25 UTCEPSS rescore
  40. 2026-08-26 17:55 UTCEG score recompute
  41. 2026-08-26 14:46 UTCEPSS rescore
  42. 2026-08-25 15:16 UTCEG score recompute
  43. 2026-08-25 13:49 UTCEPSS rescore
  44. 2026-08-25 02:34 UTCEG score recompute
  45. 2026-08-24 13:51 UTCEG score recompute
  46. 2026-08-23 12:29 UTCEG score recompute
  47. 2026-08-23 00:19 UTCEPSS rescore
  48. 2026-08-22 11:07 UTCEG score recompute
  49. 2026-08-21 23:49 UTCEPSS rescore
  50. 2026-08-21 22:26 UTCEG score recompute
  51. 2026-08-21 22:00 UTCEG score recompute
  52. 2026-08-21 10:22 UTCEG score recompute
  53. 2026-08-20 22:55 UTCEPSS rescore
  54. 2026-08-19 20:19 UTCEG score recompute
  55. 2026-08-19 19:58 UTCEG score recompute
  56. 2026-08-19 19:57 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-63188?
CVE-2026-63188 is a high vulnerability published on August 19, 2026. 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…
When was CVE-2026-63188 disclosed?
CVE-2026-63188 was first published on August 19, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63188 actively exploited?
CVE-2026-63188 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-63188?
CVE-2026-63188 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-63188?
A fix for CVE-2026-63188 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-63188 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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