CVE-2026-40939 json
DSF: Missing Session Timeout for OIDC Sessions
published 6mo ago modified 14d ago also GHSA-gj7p-595x-qwf5 , EUVD-2026-24493
- cvss
- 6.8
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 4%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Is CVE-2026-40939 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 6mo ago
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.8 | 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 |
| CNA | 4.0 | 6.8 | 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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | dev.dsf:dsf-common-jetty | all versions |
no fix listed |
| maven | dev.dsf:dsf-fhir-server | all versions |
no fix listed |
| maven | dev.dsf:dsf-bpe-server | all versions |
no fix listed |
Affected products
- datasharingframework dsf
- dev.dsf dsf-bpe-server
- dev.dsf dsf-common-jetty
- dev.dsf dsf-fhir-server
Classification
- Weakness
-
- CWE-613 DEPRECATED: Insufficient Session Expiration
References
-
github.com
/datasharingframework/dsf/commit/f4ecb002f7d12642f92da6b79371ed367d0140e7
web
-
github.com
/datasharingframework/dsf/commit/7d25feafb83d66cb59985ac88568b67d937b1937
web
-
github.com
/datasharingframework/dsf/security/advisories/GHSA-gj7p-595x-qwf5
web
-
dsf.dev
/operations/v2.1.0/bpe/oidc.html
web
-
dsf.dev
/operations/v2.1.0/fhir/oidc.html
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-40939
advisory
-
github.com
/datasharingframework/dsf
package
Sources
- CVE List CVE-2026-40939
- GitHub Advisory GHSA-gj7p-595x-qwf5
- NVD CVE-2026-40939
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