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CVE-2026-33180 hapifhir CVE debrief

CVE-2026-33180 is a high-severity vulnerability in HAPI FHIR, a Java implementation of the HL7 FHIR standard for healthcare interoperability. The issue arises from the internal HTTP client sending headers to subsequent hosts when following redirects, potentially exposing sensitive information. This vulnerability has been patched in release 6.9.0. Users are advised to update to the latest version to mitigate this risk. No known workarounds are available. The CVE was published on March 20, 2026, and modified on June 30, 2026.

Vendor
hapifhir
Product
org.hl7.fhir.core
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-20
Original CVE updated
2026-07-15
Advisory published
2026-03-20
Advisory updated
2026-07-15

Who should care

Healthcare organizations and developers using HAPI FHIR versions prior to 6.9.0 should be aware of this vulnerability. The exposure of sensitive information could lead to privacy concerns and potential impersonation of client requests. Immediate action is recommended to update to the patched version.

Technical summary

The vulnerability in HAPI FHIR occurs when the internal HTTP client sends headers to subsequent hosts during redirect handling. This could lead to the exposure of sensitive information, such as privacy-sensitive data or credentials that could be used to impersonate the client's request. The issue has been addressed in version 6.9.0. The CVSS score for this vulnerability is 7.5, indicating a high severity level. The vulnerability is categorized under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.

Defensive priority

High priority should be given to updating HAPI FHIR to version 6.9.0 or later. In the meantime, users should assess their exposure and consider compensating controls to mitigate the risk of sensitive information disclosure.

Recommended defensive actions

  • Update HAPI FHIR to version 6.9.0 or later.
  • Review and update HTTP client configurations to limit header forwarding during redirects.
  • Monitor for and respond to potential misuse of exposed sensitive information.
  • Conduct a thorough inventory of affected systems and prioritize updates.
  • Implement additional security measures to protect sensitive information.

Evidence notes

The CVE-2026-33180 vulnerability was published on March 20, 2026, and modified on June 30, 2026. The vulnerability has a CVSS score of 7.5 and is categorized as CWE-200. The issue arises from the internal HTTP client in HAPI FHIR sending headers to subsequent hosts during redirect handling, potentially exposing sensitive information. The patch for this vulnerability is included in release 6.9.0.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-33180 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-33180

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-33180 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-33180

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-p7m9-v2cm-2h7m

    [email protected]

  • Source reference

    Unverified legacy reference

    URL: https://access.redhat.com/security/cve/CVE-2026-33180

    0b0ca135-0b70-47e7-9f44-1890c2a1c46c

  • Source reference

    Unverified legacy reference

    URL: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33180.json

    0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.