CVE-2026-68981

EUVD-2026-52423

03.08.2026, 20:17

Apache NiFi 1.5.0 through 2.10.0 support gzip-encoded HTTP requests for the application REST API using a Jersey encoding filter. The framework enforced a configurable maximum request size on the compressed payload rather than the decompressed output, allowing a malicious client to send crafted requests that could consume excessive amounts of memory. Upgrading to Apache NiFi 2.11.0 is the recommended mitigation, which relocates response compression to Jetty Server and disables decompression of gzip-encoded HTTP requests.

Data Amplification

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.5 HIGH	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 42.82%

Affected Products (NVD)

Vendor	Product	Version
apache	nifi	1.5.0 ≤ 𝑥 < 2.11.0

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
The software does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.

References

https://lists.apache.org/thread/vxrqn7poyf1wx6gdy7c0dxqfqkctjngg

http://www.openwall.com/lists/oss-security/2026/08/03/13