CVE-2026-40939: CWE-613: Insufficient Session Expiration in datasharingframework dsf
CVE-2026-40939 is a medium severity vulnerability in the Data Sharing Framework (DSF) prior to version 2. 1. 0. The issue involves insufficient session expiration for OIDC-authenticated sessions, which had no maximum inactivity timeout configured. As a result, sessions persisted indefinitely after login, even after the OIDC access token expired. This vulnerability was fixed in DSF version 2. 1. 0.
AI Analysis
Technical Summary
The Data Sharing Framework (DSF) implements a distributed process engine using BPMN 2.0 and FHIR R4 standards. Versions before 2.1.0 did not enforce a maximum inactivity timeout for OIDC-authenticated sessions, allowing sessions to remain active indefinitely despite expiration of the OIDC access token. This constitutes insufficient session expiration (CWE-613). The vulnerability is addressed by configuring appropriate session timeout controls in DSF 2.1.0.
Potential Impact
Sessions remain active indefinitely after login without automatic expiration, even when the OIDC access token has expired. This could allow unauthorized continued access if session tokens are not properly invalidated, increasing the risk of session hijacking or unauthorized use. The CVSS 4.0 base score is 6.8 (medium severity), reflecting the potential for high impact on confidentiality and integrity via persistent sessions.
Mitigation Recommendations
A fix is available in Data Sharing Framework version 2.1.0, which implements proper maximum inactivity timeouts for OIDC-authenticated sessions. Users should upgrade to version 2.1.0 or later to remediate this vulnerability. No other mitigation guidance is provided or required as the issue is resolved by this official fix.
CVE-2026-40939: CWE-613: Insufficient Session Expiration in datasharingframework dsf
Description
CVE-2026-40939 is a medium severity vulnerability in the Data Sharing Framework (DSF) prior to version 2. 1. 0. The issue involves insufficient session expiration for OIDC-authenticated sessions, which had no maximum inactivity timeout configured. As a result, sessions persisted indefinitely after login, even after the OIDC access token expired. This vulnerability was fixed in DSF version 2. 1. 0.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Data Sharing Framework (DSF) implements a distributed process engine using BPMN 2.0 and FHIR R4 standards. Versions before 2.1.0 did not enforce a maximum inactivity timeout for OIDC-authenticated sessions, allowing sessions to remain active indefinitely despite expiration of the OIDC access token. This constitutes insufficient session expiration (CWE-613). The vulnerability is addressed by configuring appropriate session timeout controls in DSF 2.1.0.
Potential Impact
Sessions remain active indefinitely after login without automatic expiration, even when the OIDC access token has expired. This could allow unauthorized continued access if session tokens are not properly invalidated, increasing the risk of session hijacking or unauthorized use. The CVSS 4.0 base score is 6.8 (medium severity), reflecting the potential for high impact on confidentiality and integrity via persistent sessions.
Mitigation Recommendations
A fix is available in Data Sharing Framework version 2.1.0, which implements proper maximum inactivity timeouts for OIDC-authenticated sessions. Users should upgrade to version 2.1.0 or later to remediate this vulnerability. No other mitigation guidance is provided or required as the issue is resolved by this official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-15T20:40:15.518Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e7e91619fe3cd2cdfaec4b
Added to database: 4/21/2026, 9:16:06 PM
Last enriched: 4/21/2026, 9:32:12 PM
Last updated: 4/22/2026, 12:00:27 AM
Views: 7
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