Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Apache NiFi (Maven org.apache.nifi:nifi) versions from 0.0.1 up to 1.16.0 are vulnerable. The Standard Content Viewer and the EvaluateXPath, EvaluateXQuery and ValidateXml processors resolve XML external entities by default, so flows that handle malicious XML documents can be exposed to XXE attacks. Upgrade to version 1.16.1, which disables Document Type Declarations for these processors by default and blocks external entity resolution in standard services.
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 | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.026, the 85th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:10 UTC First seen by agentprime
- 31 Oct 2026, 15:10 UTC Confirmed by OSV