CVE-2026-40939 PUBLISHED

DSF: Missing Session Timeout for OIDC Sessions

Assigner: GitHub_M
Reserved: 15.04.2026 Published: 21.04.2026 Updated: 21.04.2026

The Data Sharing Framework (DSF) implements a distributed process engine based on the BPMN 2.0 and FHIR R4 standards. Prior to 2.1.0, OIDC-authenticated sessions had no configured maximum inactivity timeout. Sessions persisted indefinitely after login, even after the OIDC access token expired. This vulnerability is fixed in 2.1.0.

Metrics

CVSS 4.0

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
CVSS Score: 6.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Physical	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	datasharingframework
Product	dsf
Versions	Version < 2.1.0 is affected

Vendor	dev.dsf
Product	dsf-bpe-server
Versions	Version < 2.1.0 is affected

Vendor	dev.dsf
Product	dsf-common-jetty
Versions	Version < 2.1.0 is affected

Vendor	dev.dsf
Product	dsf-fhir-server
Versions	Version < 2.1.0 is affected

References

Problem Types

CWE-613: Insufficient Session Expiration CWE