Data Sharing Framework is Missing Session Timeout for OIDC Sessions
Affected Components
DSF FHIR Server with enabled OIDC authentication. DSF BPE Server with enabled OIDC authentication.
Summary
OIDC-authenticated sessions had no configured maximum inactivity timeout. Sessions persisted indefinitely after login, even after the OIDC access token expired.
Impact
If a user logs in via OIDC and leaves their browser without explicitly logging out, the session remains valid indefinitely. Another person using the same browser can access the DSF UI with the previous user's permissions. This is a realistic threat in hospital environments with shared workstations.
Only affects OIDC browser sessions, not relevant for mTLS machine-to-machine communication.
Fix (commits f4ecb00, 7d25fea)
- Added configurable session timeout via
dev.dsf.server.auth.oidc.session.timeout(default:PT30M). - Enabled
logoutWhenIdTokenIsExpired(true)in OpenID configuration to tie session lifetime to token lifetime. - Websocket sessions are now closed with
VIOLATED_POLICYwhen credentials expire, prevents stale websocket connections from continuing to receive events after session timeout.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | dev.dsf:dsf-bpe-server | all versions | no fix |
| Java / Kotlin (Maven) | dev.dsf:dsf-common-jetty | all versions | no fix |
| Java / Kotlin (Maven) | dev.dsf:dsf-fhir-server | all versions | no fix |
References
- https://github.com/datasharingframework/dsf/security/advisories/GHSA-gj7p-595x-qwf5
- https://nvd.nist.gov/vuln/detail/CVE-2026-40939
- https://github.com/datasharingframework/dsf/commit/7d25feafb83d66cb59985ac88568b67d937b1937
- https://github.com/datasharingframework/dsf/commit/f4ecb002f7d12642f92da6b79371ed367d0140e7
- https://dsf.dev/operations/v2.1.0/bpe/oidc.html
- https://dsf.dev/operations/v2.1.0/fhir/oidc.html
- https://github.com/datasharingframework/dsf
- CVSS vector
CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-613- Platform
- Java / Kotlin (Maven)
- Package
dev.dsf:dsf-bpe-server, dev.dsf:dsf-common-jetty, dev.dsf:dsf-fhir-server- Disclosed
- 15.04.2026
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-gj7p-595x-qwf5 - CC BY 4.0
Vulnerability history: dev.dsf:dsf-fhir-server
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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