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Critical · 9.8 CVE-2026-75627 EUVD-2026-60578GHSA-9v44-g22g-qfg5

Bastillion Authentication Bypass via Path-Prefix Routing Mismatch

Published Aug 18, 2026 · Updated Sep 24, 2026 · Assigned by VulnCheck

Description

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.

Affected products

VendorProductAffectedFixed
bastillion-io Bastillion ≤ 5.1.0 —

References