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

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache NiFi	affected 2.11.0

CWE

CWE-409

References

https://lists.apache.org/thread/mjpv7r4djgn7fdvhnpjwgr2rcto47mx0

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/09/16/7

CISA-ADP

No English description supplied.

No references supplied.