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VulnerabilityPublished

CVE-2026-70469: Apache NiFi · Data Amplification

Affects Apache NiFiSource CVE Database V5

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Not known to be exploited · CVSS 7.5 High.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Apache Software FoundationApache NiFiAffected
  • =2.11.0
Fixed in–
MavenApache Software Foundation/org.apache.nifi:nifi-jettypkg:maven/Apache Software Foundation/org.apache.nifi:nifi-jettyOther threatsAffected
  • =2.11.0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Apache NiFi to version 2.12.0 or later, which disables decompression of gzip-encoded HTTP requests regardless of the number of Content-Encoding headers or encoding identifiers. This official fix fully mitigates the vulnerability.

Description

Apache NiFi version 2.11.0 contains a vulnerability related to improper handling of gzip-encoded HTTP requests. The application REST API disabled support for gzip encoding but did not properly validate multiple Content-Encoding headers or non-standard gzip identifiers. This flaw allows crafted requests to consume excessive memory, leading to potential denial of service. Upgrading to version 2.12.0 mitigates this issue by disabling decompression of gzip-encoded HTTP requests regardless of header variations.

References

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