Severity: High Affected versions:
- Apache NiFi (org.apache.nifi:nifi-jetty) 2.11.0 Description: 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. This issue is being tracked as NIFI-16170 Credit: mak3bread (Minseong Kim) (finder) References: https://nifi.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-70469 https://issues.apache.org/jira/browse/NIFI-16170 Timeline: 2026-08-04: reported
