CVE-2026-75627: critical vulnerability in bastillion-io Bastillion
Bastillion Authentication Bypass via Path-Prefix Routing Mismatch
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 0.8%
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
bastillion-io · BastillionRelated CVEs — bastillion-io Bastillion
In the same product, most dangerous first.
References
https://github.com/bastillion-io/Bastillionhttps://github.com/bastillion-io/Bastillion/blob/master/src/main/java/loophole/mvc/base/BaseKontroller.javahttps://github.com/bastillion-io/Bastillion/commit/d759fb686a1a097b1b026e286fd9b20e5ba349c8https://github.com/bastillion-io/Bastillion/issues/669https://www.vulncheck.com/advisories/bastillion-authentication-bypass-via-path-prefix-routing-mismatch