CVE-2026-68981: Apache NiFi: Uncontrolled Resource Consumption through Decompression of HTTP Requests

[David Handermann <exceptionfactory () apache org>]

Severity: High 

Affected versions:

- Apache NiFi (org.apache.nifi:nifi-web-api) 1.5.0 through 2.10.0

Description:

Apache NiFi 1.5.0 through 2.10.0 support gzip-encoded HTTP requests for the application REST API using a Jersey 
encoding filter. The framework enforced a configurable maximum request size on the compressed payload rather than the 
decompressed output, allowing a malicious client to send crafted requests that could consume excessive amounts of 
memory. Upgrading to Apache NiFi 2.11.0 is the recommended mitigation, which relocates response compression to Jetty 
Server and disables decompression of gzip-encoded HTTP requests.

This issue is being tracked as NIFI-16152 

Credit:

mak3bread (Minseong Kim) (finder)

References:

https://nifi.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-68981
https://issues.apache.org/jira/browse/NIFI-16152

Timeline:

2026-07-28: reported