Bastillion Authentication Bypass via Path-Prefix Routing Mismatch
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.
CVE-2026-75627
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-75627
Bastillion
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/bastillion-io/Bastillion",
"vendor": "bastillion-io",
"product": "Bastillion",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "custom",
"lessThanOrEqual": "5.1.0"
}
],
"packageURL": "pkg:github/bastillion-io/Bastillion",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-75627
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #981 · Revision 1
- Added to Heist Feed
- Publisher date