CVE-2026-40942

DSF: Inverted Time Comparison in OIDC JWKS and Token Cache

MEDIUM
6.3
CVSS Score
Published: April 21, 2026 at 09:09 PM UTC
Updated: October 26, 2026 at 10:10 PM UTC
3 products affected across 2 vendorsDSF BPE ServerData Sharing Framework (DSF)DSF BPE Process API v2

Using dsf by datasharingframework?

Get instant alerts when new vulnerabilities affect dsf - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM6.3
Exploit prediction
EPSS 0.3%
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, The OIDC JWKS and Metadata Document caches used an inverted time comparison (isBefore instead of isAfter), causing the cache to never return cached values. Every incoming request triggered a fresh HTTP fetch of the OIDC Metadata Document and JWKS keys from the OIDC provider. The OIDC token cache for the FHIR client connections used an inverted time comparison (isBefore instead of isAfter), causing the cache to never invalidate. Every incoming request returned the same OIDC token even if 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.

v < 2.1.0
Affected range stops below 2.1.0, so it looks safe — our inference, not a vendor statement
v < 2.1.0
Affected range stops below 2.1.0, so it looks safe — our inference, not a vendor statement
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.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

6.3MEDIUMGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-670

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card