CVE-2026-40942

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.

Score

CVSS 4.0 6.3 Medium

Status

Deferred - security-advisories@github.com

Published

2026-04-21

Last modified

2026-10-26

Weaknesses

CWE-670

Affected products

• Dsf (Datasharingframework)
• Dsf-bpe-process-api-v2 (Dev.dsf)
• Dsf-bpe-server (Dev.dsf)

References

• https://github.com/datasharingframework/dsf/security/advisories/GHSA-xmj9-7625-f634
• https://github.com/datasharingframework/dsf/commit/31c2e974dfd4351756104ee8c53dbcd666192fef
• https://github.com/datasharingframework/dsf/commit/d3ca59b4daccde16a006fedeccce28fd1f826908