CVE-2026-25903
Authorization bypass for Restricted NiFi components allows config changes by low-privileged users.
Is CVE-2026-25903 being exploited?
Not confirmed. CVE-2026-25903 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.76% probability of exploitation in the next 30 days.
How severe is CVE-2026-25903?
CVE-2026-25903 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-25903?
Yes. A fix has been recorded for CVE-2026-25903. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-25903 affect?
CVE-2026-25903 affects Apache NiFi 1.1.0-2.7.2. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-25903?
Upgrade NiFi to 2.8.0 to apply fix.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Privilege escalation: low-privilege users can modify Restricted component properties, bypassing intended authorization for NiFi flows.
Patch when possible
- affected>= 1.1.0 and < 2.8.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.