CVE-2026-75627Bastillion Authentication Bypass via Path-Prefix Routing Mismatch
Updated under an hour ago ()
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It affects bastillion-io Bastillion. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-288
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
bastillion-io Bastillion bastillion_io:bastillion (from the name) | through 5.1.0 | CNA record |
References
- https://github.com/bastillion-io/Bastillion/issues/669issue-tracking
- https://github.com/bastillion-io/Bastillionproduct
- https://github.com/bastillion-io/Bastillion/commit/d759fb686a1a097b1b026e286fd9b20e5ba349c8patch
- https://github.com/bastillion-io/Bastillion/blob/master/src/main/java/loophole/mvc/base/BaseKontroller.javatechnical-description
- https://www.vulncheck.com/advisories/bastillion-authentication-bypass-via-path-prefix-routing-mismatchthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.