CVE-2026-70469: Apache Nifi

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Apache NiFi 2.11.0 disabled support for gzip-encoded HTTP requests for the application REST API and rejected requests that included the standard Content-Encoding header indicating gzip encoding. The framework enforcement filter did not check multiple instances of the Content-Encoding header and did not reject non-standard identifiers for gzip encoding, allowing a malicious client to send crafted requests that could consume excessive amounts of memory. Upgrading to Apache NiFi 2.12.0 is the recommended mitigation, which disables decompression of gzip-encoded HTTP requests regardless of header number or encoding identifiers.

Affected products

• Apache Nifi: version 2.11.0 only

Published 2026-09-16. Last modified 2026-09-21.