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Posted to dev@nifi.apache.org by David Handermann <ex...@apache.org> on 2026/09/16 13:58:54 UTC

CVE-2026-70469: Apache NiFi: Improper Handling of Case Sensitivity for Content-Encoding in HTTP Requests

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