Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Apache NiFi versions 1.0.0 through 1.11.4 are vulnerable to XML External Entity (XXE) injection. The notification service manager and some policy authorizer and user group provider objects let trusted administrators configure an XML file that can make external calls to services. Upgrade to NiFi 1.12.0-RC1 or later, which contains the fix.
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 |
|---|---|---|---|---|
| 5.5 | Medium | 3.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.019, the 80th percentile, on 11 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