CVE-2026-40939: DSF: Missing Session Timeout for OIDC Sessions

Severity: medium (CVSS 6.8 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-21 · updated 2026-10-26
Weakness: CWE-613

Description

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.

Affected products

datasharingframework dsf: before 2.1.0
dev.dsf dsf-bpe-server: before 2.1.0
dev.dsf dsf-common-jetty: before 2.1.0
dev.dsf dsf-fhir-server: before 2.1.0

References

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/commit/f4ecb002f7d12642f92da6b79371ed367d0140e7
https://github.com/datasharingframework/dsf/security/advisories/GHSA-gj7p-595x-qwf5

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