What’s Vulnerable › Vulnerabilities

CVE-2026-68981: Apache NiFi: Uncontrolled Resource Consumption through Decompression of HTTP Requests

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-03 · updated 2026-10-23
• Weakness: CWE-409

Description

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.

Affected products

• Apache Software Foundation Apache NiFi: from 1.5.0 before 2.11.0 — fixed in 2.11.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache NiFi 2.11.0. Check the vendor advisory for mitigations.

References

• https://lists.apache.org/thread/vxrqn7poyf1wx6gdy7c0dxqfqkctjngg
• http://www.openwall.com/lists/oss-security/2026/08/03/13

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