Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
HAPI FHIR org.hl7.fhir modules before 6.9.0 send request headers to the host named in a redirect's Location header when following redirects. The receiving host can read those headers, which may contain privacy-sensitive data or allow impersonation of the client. Upgrade to 6.9.0; the source also cites 6.8.3 as the patched release, and no workaround is given.
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 |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0028, the 20th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:20 UTC First seen by agentprime
- 31 Oct 2026, 14:20 UTC Confirmed by OSV