CVE-2026-70469

Apache NiFi 2.11.0 disabled support for gzip-encoded HTTP requests for the application REST API and rejected requests that included the standard Content-Encoding header indicating gzip encoding. The framework enforcement filter did not check multiple instances of the Content-Encoding header and did not reject non-standard identifiers for gzip encoding, allowing a malicious client to send crafted requests that could consume excessive amounts of memory. Upgrading to Apache NiFi 2.12.0 is the recommended mitigation, which disables decompression of gzip-encoded HTTP requests regardless of header number or encoding identifiers.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/mjpv7r4djgn7fdvhnpjwgr2rcto47mx0	Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/09/16/7	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:apache:nifi:2.11.0:*:*:*:*:*:*:*

History

21 Sep 2026, 13:42

Type	Values Removed	Values Added
CPE		cpe:2.3:a:apache:nifi:2.11.0:::::::*
References	~~() https://lists.apache.org/thread/mjpv7r4djgn7fdvhnpjwgr2rcto47mx0 -~~	() https://lists.apache.org/thread/mjpv7r4djgn7fdvhnpjwgr2rcto47mx0 - Mailing List, Vendor Advisory
References	~~() http://www.openwall.com/lists/oss-security/2026/09/16/7 -~~	() http://www.openwall.com/lists/oss-security/2026/09/16/7 - Mailing List, Third Party Advisory
First Time		Apache Apache nifi

17 Sep 2026, 20:18

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

16 Sep 2026, 21:17

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/09/16/7 -

16 Sep 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-16 20:17

Updated : 2026-09-21 13:42

NVD link : CVE-2026-70469

Mitre link : CVE-2026-70469

CVE.ORG link : CVE-2026-70469

JSON object : View

Products Affected

apache

nifi

CWE

CWE-409

Improper Handling of Highly Compressed Data (Data Amplification)

{"id": "CVE-2026-70469", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-70469", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-17T19:38:13.718708Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@apache.org", "affectedData": [{"vendor": "Apache Software Foundation", "product": "Apache NiFi", "versions": [{"status": "affected", "version": "2.11.0", "versionType": "semver"}], "packageURL": "pkg:maven/org.apache.nifi/nifi-jetty", "packageName": "org.apache.nifi:nifi-jetty", "collectionURL": "https://repo.maven.apache.org/maven2", "defaultStatus": "unaffected"}]}], "published": "2026-09-16T20:17:26.877", "references": [{"url": "https://lists.apache.org/thread/mjpv7r4djgn7fdvhnpjwgr2rcto47mx0", "tags": ["Mailing List", "Vendor Advisory"], "source": "security@apache.org"}, {"url": "http://www.openwall.com/lists/oss-security/2026/09/16/7", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@apache.org", "description": [{"lang": "en", "value": "CWE-409"}]}], "descriptions": [{"lang": "en", "value": "Apache NiFi 2.11.0 disabled support for gzip-encoded HTTP requests for the application REST API and rejected requests that included the standard Content-Encoding header indicating gzip encoding. The framework enforcement filter did not check multiple instances of the Content-Encoding header and did not reject non-standard identifiers for gzip encoding, allowing a malicious client to send crafted requests that could consume excessive amounts of memory. Upgrading to Apache NiFi 2.12.0 is the recommended mitigation, which disables decompression of gzip-encoded HTTP requests regardless of header number or encoding identifiers."}], "lastModified": "2026-09-21T13:42:42.460", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:nifi:2.11.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DD4321D7-43B4-4BA3-88F0-4D1588EA5F02"}], "operator": "OR"}]}], "sourceIdentifier": "security@apache.org"}