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CVE-2026-70469

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

Published: Sep 16, 2026Updated: Sep 17, 2026 Sources: CVE List NVDCWE-409
7.5HIGH
NVD MITRE
EPSS Score
0.4%
Top 69.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-409

Affected Products

Apache Software Foundation
oss-project·USaka apache foundation
Apache NiFiOn-premWeb App
Web & CMS Plugins / cms-core

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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References

https://lists.apache.org/thread/mjpv7r4djgn7fdvhnpjwgr2rcto47mx0
lists.apache.org
http://www.openwall.com/lists/oss-security/2026/09/16/7
openwall.com

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