CVE-2026-75627

Critical

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.

SeverityCritical

CVSS9.8

Exploit probability—

ProductBastillion

PublishedAug 18, 2026

First seenAug 18, 2026

Weakness typeCWE-288CWE-288

How to fix

Patches

github.com/bastillion-io/Bastillion/commit/d759fb686a1a097b1b026e286fd9b20e5ba349c8

Affected products

Product	Affected versions	Fixed in
bastillion-io Bastillion	v ≤ 5.1.0	—

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