What is CVE-2026-68981?

CVE-2026-68981 is a high-severity vulnerability in Apache Nifi, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 7.5/10. Published 2026-08-03.

How severe is CVE-2026-68981?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Apache Nifi

CVE-2026-68981

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.

EPSS: 0.005 (42.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Apache Nifi
Apache Software Foundation Nifi — versions 1.5.0

Weakness classification (CWE)

CWE-409 — Improper Handling of Highly Compressed Data (Data Amplification)

References

security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-68981?: CVE-2026-68981 is a high-severity vulnerability in Apache Nifi, classified under Improper Handling of Highly Compressed Data (Data Amplification). CVSS score: 7.5/10. Published 2026-08-03.
How severe is CVE-2026-68981?: High severity. CVSS v3 base score is 7.5 out of 10.