CVE-2026-75627Public exploitNetwork attack vector

Unauthenticated admin bypass via path-prefix routing

Published Aug 18, 2026 · Updated Aug 18, 2026

Authentication bypass in Bastillion through 5.1.0 allows remote attackers to reach administrative controllers via crafted URI prefixes. BaseKontroller.execute() dispatches a controller when request.getRequestURI() merely contains the controller path, while AuthFilter protects only normalized /manage/* and /admin/* servlet paths, so prefixed requests are routed to privileged handlers without the intended login check. No credentials are required on exposed HTTPS endpoints, and successful exploitation lets attackers read user listings, create manager accounts, register managed systems, and take over SSH access brokerage for the managed fleet.

CVSS severity9.8
Critical
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in Bastillion through 5.1.0 allows remote attackers to reach administrative controllers via crafted URI prefixes. BaseKontroller.execute() dispatches a controller when request.getRequestURI() merely contains the controller path, while AuthFilter protects only normalized /manage/* and /admin/* servlet paths, so prefixed requests are routed to privileged handlers without the intended login check. No credentials are required on exposed HTTPS endpoints, and successful exploitation lets attackers read user listings, create manager accounts, register managed systems, and take over SSH access brokerage for the managed fleet.

The record

CVE
CVE-2026-75627
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
Loophole, LLC
Product
Bastillion
Classifications
CWE-288, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=5.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Loophole, LLC · Bastillionversion=0 <=5.1.0

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-288Authentication Bypass Using an Alternate Path or Channel
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo