Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The org.fhir:ucum Java package before 1.0.9 is vulnerable to XML external entity injection in its XML parsing performed by UcumEssenceService. An attacker who can get a crafted XML file with a malicious DTD processed, such as through an external client submitting XML to the host, could read data from the host system. Upgrade to version 1.0.9 or later; if upgrading is not possible, use only trusted XML sources when instantiating UcumEssenceService.
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 0.0056, the 46th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:12 UTC First seen by agentprime
- 31 Oct 2026, 15:12 UTC Confirmed by OSV