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.
History

Mon, 21 Sep 2026 14:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:apache:nifi:2.11.0:*:*:*:*:*:*:*

Fri, 18 Sep 2026 04:00:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache nifi
Vendors & Products Apache
Apache nifi

Thu, 17 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 16 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
References

Wed, 16 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
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.
Title Apache NiFi: Improper Handling of Case Sensitivity for Content-Encoding in HTTP Requests
Weaknesses CWE-409
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published: 2026-09-16T19:38:42.341Z

Updated: 2026-09-17T19:38:26.785Z

Reserved: 2026-08-04T15:09:34.902Z

Link: CVE-2026-70469

cve-icon Vulnrichment

Updated: 2026-09-17T19:38:23.503Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-16T20:17:26.877

Modified: 2026-09-21T13:42:42.460

Link: CVE-2026-70469

cve-icon Redhat

No data.