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CVE-2026-40939

DSF: Missing Session Timeout for OIDC Sessions

MEDIUM
6.8
CVSS Score
Published: April 21, 2026 at 09:07 PM UTC
Updated: October 26, 2026 at 09:10 PM UTC
4 products affected across 2 vendorsDSF BPE ServerData Sharing Framework (DSF)DSF Common Jetty

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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Data Sharing Framework (DSF)· Datasharingframework
90%
v < 2.1.0
Affected range stops below 2.1.0, so it looks safe — our inference, not a vendor statement
DSF BPE Server· Dev Dsf
90%
v < 2.1.0
Affected range stops below 2.1.0, so it looks safe — our inference, not a vendor statement
DSF Common Jetty· Dev Dsf
90%
v < 2.1.0
Affected range stops below 2.1.0, so it looks safe — our inference, not a vendor statement
DSF FHIR Server· Dev Dsf
90%
v < 2.1.0
Affected range stops below 2.1.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

x_refsource_CONFIRM
Source: cverecord
https://github.com/datasharingframework/dsf/security/advisories/GHSA-gj7p-595x-qwf5
x_refsource_MISC
Source: cverecord
https://github.com/datasharingframework/dsf/commit/f4ecb002f7d12642f92da6b79371ed367d0140e7
x_refsource_MISC
Source: cverecord
https://dsf.dev/operations/v2.1.0/bpe/oidc.html
x_refsource_MISC
Source: cverecord
https://dsf.dev/operations/v2.1.0/fhir/oidc.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.8MEDIUMGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-613

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