CVE-2026-34359: high-severity vulnerability in hapifhir org.hl7.fhir.core
HAPI FHIR: Authentication Credential Leakage via Improper URL Prefix Matching on HTTP Redirect in HAPI FHIR Core
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.4epss 0.2%
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to version 6.9.4, ManagedWebAccessUtils.getServer() uses String.startsWith() to match request URLs against configured server URLs for authentication credential dispatch. Because configured server URLs (e.g., http://tx.fhir.org) lack a trailing slash or host boundary check, an attacker-controlled domain like http://tx.fhir.org.attacker.com matches the prefix and receives Bearer tokens, Basic auth credentials, or API keys when the HTTP client follows a redirect to that domain. This issue has been patched in version 6.9.4.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected products
hapifhir · org.hl7.fhir.coreRelated CVEs — hapifhir org.hl7.fhir.core
In the same product, most dangerous first.
CVE-2024-45294HIGH`org.hl7.fhir.core` XXE vulnerability in XSLT transformsEPSS 1.0%CVE-2024-52007HIGHXXE vulnerability in XSLT parsing in `org.hl7.fhir.core`EPSS 0.9%CVE-2026-49485HIGHHAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP EndpointEPSS 0.7%CVE-2026-45367HIGHHAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP EndpointEPSS 0.7%CVE-2026-55470HIGHHAPI FHIR: DSTU2 FHIRPathEngine.matches() missing RegexTimeout protection allows ReDoSEPSS 0.7%CVE-2026-81876HIGHHAPI FHIR: SHCParser DEFLATE infinite loop causes denial of serviceEPSS 0.6%