CVE-2026-40939

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 49/100
Published: 2026-04-21 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Physical
AC: Low
PR: None
UI: None
S: X
AT: None
VC: High
VI: High
VA: None

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.

Weakness Classification (1)

Bug Bounty Relevance

49 / 100
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

6.8 / 10.0 v4.0
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/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

EPSS — Exploitation Probability

0.15%
Raw Score 0.001540
Percentile 4.5%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00154
2026-10-28
0.00154

Intelligence Sources

nvd ref →