Insufficiently Protected Credentials Affecting ca.uhn.hapi.fhir:org.hl7.fhir.validation package, versions [6.8.0,6.9.4)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published31 Mar 2026
- disclosed30 Mar 2026
- creditoffset
Introduced: 30 Mar 2026
CVE-2026-34361 (opens in a new tab)How to fix?
Upgrade ca.uhn.hapi.fhir:org.hl7.fhir.validation to version 6.9.4 or higher.
Overview
Affected versions of this package are vulnerable to Insufficiently Protected Credentials through and exposed /loadIG endpoint in ca.uhn.hapi.fhir:org.hl7.fhir.validation. An attacker can obtain authentication credentials for external FHIR servers by submitting a crafted URL that exploits improper prefix matching in credential handling, causing sensitive tokens to be sent to attacker-controlled domains. This can also be triggered through redirect chains that re-evaluate credential attachment on each hop.
Note: While the entry point for this vulnerability is in ca.uhn.hapi.fhir:org.hl7.fhir.validation, it leverages an exploit chain in ca.uhn.hapi.fhir:org.hl7.fhir.utilities CVE-2026-34359 to expose the credentials