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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-70469
StatePUBLISHED
Assignerapache
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-16 20:17:26 UTC
Updated2026-09-16 21:17:13 UTC
DescriptionApache 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.

Risk And Classification

Problem Types: CWE-409 | CWE-409 CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Apache Software Foundation Apache NiFi affected 2.11.0 semver Not specified

References

ReferenceSourceLinkTags
www.openwall.com/lists/oss-security/2026/09/16/7 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
lists.apache.org/thread/mjpv7r4djgn7fdvhnpjwgr2rcto47mx0 [email protected] lists.apache.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: mak3bread (Minseong Kim) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-04T12:00:00.000Zreported

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