CVE-2026-75627

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-18. The CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 9.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Bastillion fails to properly validate request URI paths in its controller dispatcher, allowing unauthenticated attackers to bypass authentication filters by prefixing requests with arbitrary path segments. Attackers can access administrative controllers to read user listings, create manager accounts, and register managed systems, gaining control over SSH access to the managed fleet.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100CISA 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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
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
0.8%
EPSS %ILE
56th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

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

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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 18, 2026

Last Modified

September 24, 2026

Advisory Details (5)

Auto-updated Oct 1, 2026
Patch available. Sources: github_commit.
generic

Bastillion Authentication Bypass via Path-Prefix Routing Mismatch | Advisories | VulnCheck

https://www.vulncheck.com/advisories/bastillion-authentication-bypass-via-path-prefix-routing-mismatch
generic

Bastillion/src/main/java/loophole/mvc/base/BaseKontroller.java at main · Loophole-LLC/Bastillion · GitHub

https://github.com/bastillion-io/Bastillion/blob/master/src/main/java/loophole/mvc/base/BaseKontroller.java
github_commit Patch Available

commit d759fb686a1a (bastillion-io/Bastillion)

Patch available: bastillion-io/Bastillion v5.2.0 (contains commit d759fb686a1a)

https://github.com/bastillion-io/Bastillion/commit/d759fb686a1a097b1b026e286fd9b20e5ba349c8
generic

GitHub - Loophole-LLC/Bastillion: Bastillion gives you a clean, browser-based way to manage SSH access across all your systems—like a bastion host with a friendly dashboard. · GitHub

https://github.com/bastillion-io/Bastillion
generic

Unauthenticated admin bypass in Bastillion via path-prefix routing mismatch · Issue #669 · Loophole-LLC/Bastillion · GitHub

https://github.com/bastillion-io/Bastillion/issues/669

Vendor Advisories for CVE-2026-75627(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 33× in last 7d / 192× 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.

Showing the most recent 100 of 332 total refreshes for this CVE.

  1. 2026-10-05 11:50 UTCGHSA enrichment
  2. 2026-10-05 06:14 UTCGHSA enrichment
  3. 2026-10-05 01:57 UTCGHSA enrichment
  4. 2026-10-04 21:46 UTCGHSA enrichment
  5. 2026-10-04 16:23 UTCGHSA enrichment
  6. 2026-10-04 11:43 UTCGHSA enrichment
  7. 2026-10-04 07:16 UTCGHSA enrichment
  8. 2026-10-04 03:13 UTCGHSA enrichment
  9. 2026-10-03 22:39 UTCGHSA enrichment
  10. 2026-10-03 17:44 UTCEG score recompute
  11. 2026-10-03 17:44 UTCGHSA enrichment
  12. 2026-10-03 14:26 UTCEPSS rescore
  13. 2026-10-03 00:45 UTCGHSA enrichment
  14. 2026-10-02 19:47 UTCEG score recompute
  15. 2026-10-02 19:47 UTCGHSA enrichment
  16. 2026-10-02 15:43 UTCGHSA enrichment
  17. 2026-10-02 06:55 UTCGHSA enrichment
  18. 2026-10-02 01:33 UTCEG score recompute
  19. 2026-10-02 01:32 UTCGHSA enrichment
  20. 2026-10-01 19:50 UTCEPSS rescore
  21. 2026-10-01 13:55 UTCGHSA enrichment
  22. 2026-10-01 09:51 UTCGHSA enrichment
  23. 2026-10-01 05:48 UTCGHSA enrichment
  24. 2026-10-01 01:30 UTCGHSA enrichment
  25. 2026-09-30 20:51 UTCEG score recompute
Show 75 more
  1. 2026-09-30 20:51 UTCGHSA enrichment
  2. 2026-09-30 09:56 UTCEG score recompute
  3. 2026-09-30 09:55 UTCGHSA enrichment
  4. 2026-09-29 15:24 UTCEPSS rescore
  5. 2026-09-29 06:27 UTCGHSA enrichment
  6. 2026-09-29 02:24 UTCGHSA enrichment
  7. 2026-09-28 21:58 UTCEG score recompute
  8. 2026-09-28 21:58 UTCGHSA enrichment
  9. 2026-09-28 14:13 UTCEG score recompute
  10. 2026-09-28 14:13 UTCGHSA enrichment
  11. 2026-09-28 13:52 UTCEPSS rescore
  12. 2026-09-28 10:09 UTCGHSA enrichment
  13. 2026-09-28 06:04 UTCGHSA enrichment
  14. 2026-09-28 02:00 UTCGHSA enrichment
  15. 2026-09-27 21:36 UTCGHSA enrichment
  16. 2026-09-27 16:28 UTCEG score recompute
  17. 2026-09-27 16:28 UTCGHSA enrichment
  18. 2026-09-27 13:48 UTCEPSS rescore
  19. 2026-09-27 12:22 UTCGHSA enrichment
  20. 2026-09-27 08:03 UTCEG score recompute
  21. 2026-09-27 08:03 UTCGHSA enrichment
  22. 2026-09-26 15:59 UTCEPSS rescore
  23. 2026-09-26 00:28 UTCEPSS rescore
  24. 2026-09-25 09:52 UTCGHSA enrichment
  25. 2026-09-25 05:48 UTCGHSA enrichment
  26. 2026-09-25 01:44 UTCGHSA enrichment
  27. 2026-09-24 14:59 UTCEG score recompute
  28. 2026-09-24 14:59 UTCGHSA enrichment
  29. 2026-09-24 14:04 UTCEPSS rescore
  30. 2026-09-24 13:45 UTCGHSA enrichment
  31. 2026-09-24 09:41 UTCGHSA enrichment
  32. 2026-09-24 05:37 UTCGHSA enrichment
  33. 2026-09-24 01:33 UTCGHSA enrichment
  34. 2026-09-23 21:30 UTCEG score recompute
  35. 2026-09-23 21:30 UTCGHSA enrichment
  36. 2026-09-23 17:54 UTCEPSS rescore
  37. 2026-09-23 17:26 UTCGHSA enrichment
  38. 2026-09-23 16:59 UTCGHSA enrichment
  39. 2026-09-23 12:53 UTCGHSA enrichment
  40. 2026-09-23 08:49 UTCGHSA enrichment
  41. 2026-09-23 04:45 UTCGHSA enrichment
  42. 2026-09-23 00:41 UTCGHSA enrichment
  43. 2026-09-22 20:36 UTCEG score recompute
  44. 2026-09-22 20:36 UTCGHSA enrichment
  45. 2026-09-22 16:01 UTCEPSS rescore
  46. 2026-09-22 12:48 UTCGHSA enrichment
  47. 2026-09-22 08:43 UTCGHSA enrichment
  48. 2026-09-22 04:40 UTCGHSA enrichment
  49. 2026-09-22 00:35 UTCEG score recompute
  50. 2026-09-22 00:35 UTCGHSA enrichment
  51. 2026-09-21 21:09 UTCEPSS rescore
  52. 2026-09-21 20:30 UTCGHSA enrichment
  53. 2026-09-21 16:22 UTCGHSA enrichment
  54. 2026-09-21 12:18 UTCGHSA enrichment
  55. 2026-09-21 08:14 UTCGHSA enrichment
  56. 2026-09-21 02:51 UTCGHSA enrichment
  57. 2026-09-20 22:41 UTCEG score recompute
  58. 2026-09-20 22:41 UTCGHSA enrichment
  59. 2026-09-20 20:16 UTCEPSS rescore
  60. 2026-09-20 18:37 UTCGHSA enrichment
  61. 2026-09-20 14:11 UTCGHSA enrichment
  62. 2026-09-20 09:43 UTCGHSA enrichment
  63. 2026-09-20 03:38 UTCGHSA enrichment
  64. 2026-09-19 23:34 UTCGHSA enrichment
  65. 2026-09-19 19:30 UTCEG score recompute
  66. 2026-09-19 19:30 UTCGHSA enrichment
  67. 2026-09-19 15:12 UTCGHSA enrichment
  68. 2026-09-19 10:57 UTCGHSA enrichment
  69. 2026-09-19 06:04 UTCGHSA enrichment
  70. 2026-09-19 01:57 UTCGHSA enrichment
  71. 2026-09-18 21:54 UTCEG score recompute
  72. 2026-09-18 21:54 UTCGHSA enrichment
  73. 2026-09-18 19:28 UTCEPSS rescore
  74. 2026-09-18 16:46 UTCGHSA enrichment
  75. 2026-09-18 12:31 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-75627?
CVE-2026-75627 is a critical vulnerability published on August 18, 2026. Bastillion fails to properly validate request URI paths in its controller dispatcher, allowing unauthenticated attackers to bypass authentication filters by prefixing requests with arbitrary path segments. Attackers can access administrative controllers to read user listings, create manager…
When was CVE-2026-75627 disclosed?
CVE-2026-75627 was first published on August 18, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75627 actively exploited?
CVE-2026-75627 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75627?
CVE-2026-75627 has a CVSS base score of 9.8 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-75627?
A fix for CVE-2026-75627 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-75627 are linked in the Vendor Advisories panel on this page.

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