CVE-2026-70469 Apache NiFi - Denial of Service

Apache NiFi 2.11.0 contains a denial of service vulnerability caused by improper handling of multiple or non-standard gzip Content-Encoding headers in the REST API, letting attackers consume excessive memory, exploit requires sending crafted HTTP requests.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.62% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
16 September 2026
Updated
15 October 2026
Weakness
CWE-409

Vendor fix

Upgrade to Apache NiFi 2.12.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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