CVE-2026-9226
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Authentication Bypass in Devolutions Server via Session Token Replay

Publication date: 2026-10-06

Last updated on: 2026-10-06

Assigner: Devolutions Inc.

Description
Authentication bypass in the Azure AD external login flow in Devolutions Server 2026.3.7.0 and earlier allows a remote attacker to take over a user's account via replay of a captured login-session token exposed in a redirect URL.

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Meta Information

Published
2026-10-06
Last Modified
2026-10-06
Generated
2026-10-06
AI Q&A
2026-10-06
EPSS Evaluated
N/A
NVD
CVE-2026-9226
EUVD
EUVD-2026-93779

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Devolutions Server 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-294 A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).

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Executive Summary

This vulnerability is an authentication bypass in the Azure AD external login flow of Devolutions Server versions 2026.3.7.0 and earlier. It allows a remote attacker to gain unauthorized access to a user's account by replaying a captured login-session token that was exposed in a redirect URL.

Impact Analysis

If you use Devolutions Server 2026.3.7.0 or earlier, an attacker could exploit this to take over your account without needing your credentials. This could lead to unauthorized access to sensitive data, system control, or further attacks within your environment.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and access controls. Organizations using affected versions may face compliance violations, legal penalties, and reputational damage.

Mitigation Strategies

Update Devolutions Server to a version later than 2026.3.7.0 to address the authentication bypass vulnerability.

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