Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
XXE vulnerability in XSLT transforms affects the org.hl7.fhir.core libraries (org.hl7.fhir.dstu2016may, dstu3, r4, r4b, r5 and utilities) before version 6.3.23. An attacker who can submit XML to an application using these libraries can make the XSLT processing read data from the host system and include it in the output. Upgrade to version 6.3.23. No workaround is listed.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.6 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0097, the 62nd percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:09 UTC First seen by agentprime
- 31 Oct 2026, 15:09 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-6cr6-ph3p-f5rf
- OSV: GHSA-6cr6-ph3p-f5rf
- github.com/HL7/fhir-ig-publisher/security/advisories/GHSA-59rq-22fm-x8q5
- github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-6cr6-ph3p-f5rf
- nvd.nist.gov/vuln/detail/CVE-2024-45294
- github.com/HL7/fhir-ig-publisher/releases/tag/1.6.22
- github.com/hapifhir/org.hl7.fhir.core
- github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.3.23