CVE-2026-40939
DSF: Missing Session Timeout for OIDC Sessions
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.
INFO
Published Date :
April 21, 2026, 10:16 p.m.
Last Modified :
Oct. 26, 2026, 9:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-40939
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Data Sharing Framework to version 2.1.0 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40939.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40939 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40939
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40939 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40939 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: Múltiples productos de datasharingframework (dsf, dsf-bpe-server y otros), Description: El Data Sharing Framework (DSF) implementa un motor de procesos distribuido basado en los estándares BPMN 2.0 y FHIR R4. Antes de 2.1.0, las sesiones autenticadas con OIDC no tenían un tiempo de inactividad máximo configurado. Las sesiones persistían indefinidamente después del inicio de sesión, incluso después de que el token de acceso OIDC caducara. Esta vulnerabilidad está corregida en 2.1.0. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'datasharingframework', 'product': 'dsf', 'versions': [{'status': 'affected', 'version': '< 2.1.0'}]}, {'vendor': 'dev.dsf', 'product': 'dsf-bpe-server', 'versions': [{'status': 'affected', 'version': '< 2.1.0'}]}, {'vendor': 'dev.dsf', 'product': 'dsf-common-jetty', 'versions': [{'status': 'affected', 'version': '< 2.1.0'}]}, {'vendor': 'dev.dsf', 'product': 'dsf-fhir-server', 'versions': [{'status': 'affected', 'version': '< 2.1.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-40939', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-04-22T17:43:47.019567Z'} -
New CVE Received by [email protected]
Apr. 21, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-613 Added Reference https://dsf.dev/operations/v2.1.0/bpe/oidc.html Added Reference https://dsf.dev/operations/v2.1.0/fhir/oidc.html Added Reference https://github.com/datasharingframework/dsf/commit/f4ecb002f7d12642f92da6b79371ed367d0140e7 Added Reference https://github.com/datasharingframework/dsf/security/advisories/GHSA-gj7p-595x-qwf5