CVE-2026-70469

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

Published Sep 16, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

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History
Type Values Removed Values Added
CPEs cpe:2.3:a:apache:nifi:2.11.0:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Apache
Apache nifi
Vendors & Products Apache
Apache nifi
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'}

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
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Sep 17, 2026, 7:38 PM
Reserved
Aug 4, 2026, 3:09 PM
Status
Analyzed
Published
Sep 16, 2026, 8:17 PM
Modified
Sep 21, 2026, 1:42 PM