CVE-2026-100286 Overview
CVE-2026-100286 is a missing authorization vulnerability in the data source settings API of Devolutions Server. The flaw affects Devolutions Server version 2026.3.5.0 and earlier. An authenticated non-administrative user can send a crafted API request to disclose integration secrets. The issue is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor. Exploitation requires valid low-privileged credentials but no user interaction. Successful exploitation reveals secrets that may enable follow-on attacks against integrated third-party systems.
Critical Impact
Authenticated low-privileged users can retrieve integration secrets through the data source settings API, exposing credentials used to access connected third-party services.
Affected Products
- Devolutions Server 2026.3.5.0 and earlier
Discovery Timeline
- 2026-09-29 - CVE CVE-2026-100286 published to NVD
- 2026-09-29 - Last updated in NVD database
Technical Details for CVE-2026-100286
Vulnerability Analysis
The vulnerability resides in the data source settings API exposed by Devolutions Server. The endpoint fails to enforce administrative privilege checks before returning configuration data. Any authenticated account, regardless of role, can query the endpoint and receive integration secrets in the response. Integration secrets typically include API keys, service account credentials, and tokens used to connect Devolutions Server to external services such as directory providers, ticketing systems, and password vaults.
Because the disclosed material is credential data, the impact extends beyond Devolutions Server itself. An attacker with a standard user account can pivot to any system whose credentials are stored as integration secrets. The confidentiality impact is high, while integrity and availability are unaffected. See the Devolutions Security Advisory DEVO-2026-0034 for vendor details.
Root Cause
The root cause is a missing authorization check on the data source settings API handler. The endpoint validates that the caller is authenticated but does not verify the caller holds an administrative role. This is a broken access control defect where the authorization decision is skipped rather than incorrectly evaluated.
Attack Vector
The attack vector is network-based and requires valid credentials for any Devolutions Server account. An attacker authenticates as a standard user, then issues a crafted HTTP request to the data source settings API. The server returns the integration secrets in the response body. No social engineering or user interaction is required.
No verified public exploit code is available. Refer to the vendor advisory for technical remediation details.
Detection Methods for CVE-2026-100286
Indicators of Compromise
- Requests to the data source settings API originating from accounts without administrative roles.
- Unexpected outbound activity from services whose credentials are stored as Devolutions Server integration secrets.
- Authentication events on integrated third-party systems using service credentials from anomalous source addresses.
Detection Strategies
- Review Devolutions Server access logs for API calls to data source settings endpoints made by non-administrative principals.
- Correlate API request timestamps with subsequent authentication events on integrated systems to identify credential reuse.
- Baseline normal administrative API traffic and alert on deviations from expected user roles or source IPs.
Monitoring Recommendations
- Forward Devolutions Server audit logs to a centralized logging platform for retention and query.
- Enable alerts on read access to sensitive configuration endpoints by low-privileged accounts.
- Rotate and monitor integration credentials for anomalous usage patterns following any suspected exposure.
How to Mitigate CVE-2026-100286
Immediate Actions Required
- Upgrade Devolutions Server to a version later than 2026.3.5.0 as directed by the vendor advisory.
- Rotate all integration secrets configured in Devolutions Server, treating them as potentially disclosed.
- Audit user accounts and remove any unnecessary standard user access to the server.
- Review recent API access logs for evidence of unauthorized queries against data source settings endpoints.
Patch Information
Devolutions has published remediation guidance in Devolutions Security Advisory DEVO-2026-0034. Administrators should apply the vendor-supplied fixed version to remediate the missing authorization check on the data source settings API.
Workarounds
- Restrict network access to the Devolutions Server administrative and API interfaces to trusted management networks until patching is complete.
- Limit account provisioning to trusted personnel and disable unused low-privileged accounts.
- Rotate integration secrets on a defined schedule to reduce the window of exposure for any previously disclosed credentials.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
