{"id":"CVE-2026-70469","state":"PUBLISHED","title":"Apache NiFi: Improper Handling of Case Sensitivity for Content-Encoding in HTTP Requests","description":"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.","publishedAt":"2026-09-16T19:38:42.341Z","updatedAt":"2026-09-17T19:38:26.785Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","source":"CISA-ADP"},"assigner":"apache","products":["Apache Software Foundation Apache NiFi"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache NiFi","packageName":"org.apache.nifi:nifi-jetty","packageURL":"pkg:maven/org.apache.nifi/nifi-jetty","defaultStatus":"unaffected","versions":[{"version":"2.11.0","status":"affected","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"}],"references":["https://lists.apache.org/thread/mjpv7r4djgn7fdvhnpjwgr2rcto47mx0","http://www.openwall.com/lists/oss-security/2026/09/16/7"],"weaknesses":["CWE-409"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/70xxx/CVE-2026-70469.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-70469","state":"PUBLISHED","datePublished":"2026-09-16T19:38:42.341Z","dateUpdated":"2026-09-17T19:38:26.785Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-08-04T15:09:34.902Z"},"containers":{"cna":{"title":"Apache NiFi: Improper Handling of Case Sensitivity for Content-Encoding in HTTP Requests","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. 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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."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache NiFi","packageName":"org.apache.nifi:nifi-jetty","packageURL":"pkg:maven/org.apache.nifi/nifi-jetty","defaultStatus":"unaffected","versions":[{"version":"2.11.0","status":"affected","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"}],"references":[{"url":"https://lists.apache.org/thread/mjpv7r4djgn7fdvhnpjwgr2rcto47mx0","tags":["vendor-advisory"]}],"metrics":[{"other":{"type":"Textual description of severity","content":{"text":"High"}},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-409","description":"CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-09-16T19:38:42.341Z"},"source":{"defect":["NIFI-16170"],"discovery":"EXTERNAL"},"timeline":[{"time":"2026-08-04T12:00:00.000Z","lang":"en","value":"reported"}],"credits":[{"lang":"en","value":"mak3bread (Minseong Kim)","type":"finder"}],"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/09/16/7"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-09-16T20:12:06.858Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"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"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-09-17T19:38:13.718708Z","id":"CVE-2026-70469","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-17T19:38:26.785Z"}}]}}}