Auth bypass in Apache Nifi
CVE-2026-62354
Authorization handling for Parameter Context validation requests in Apache NiFi 1.10.0 through 2.10.0 allows clients with read access to submit proposed Parameter values. The proposed values override current configuration, enabling users with read access to invoke predefined component validation methods with alternative settings. Apache NiFi installations that do not implement different levels of authorization for viewing and modifying Parameter Context configuration are not subject to this vulnerability. Upgrading to Apache NiFi 2.11.0 is the recommended mitigation, requiring write access to submit Parameter Context validation requests.
Vulnerability class: Broken Access Control
EPSS: 0.003 (24.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Apache Nifi
- Apache Software Foundation Nifi — versions 1.10.0
Weakness classification (CWE)
References
- security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-62354?
- CVE-2026-62354 is a medium-severity vulnerability in Apache Nifi, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-08-03.
- How severe is CVE-2026-62354?
- Medium severity. CVSS v3 base score is 4.3 out of 10.