{"id":"CVE-2026-70469","summary":"Apache NiFi: Improper Handling of Case Sensitivity for Content-Encoding in HTTP Requests","details":"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.","aliases":["BIT-nifi-2026-70469"],"modified":"2026-09-23T03:46:40.715296292Z","published":"2026-09-16T19:38:42.341Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70469.json","unresolved_ranges":[{"extracted_events":[{"introduced":"2.11.0"},{"last_affected":"2.11.0"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"apache","cwe_ids":["CWE-409"]},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/09/16/7"},{"type":"WEB","url":"https://repo.maven.apache.org/maven2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70469.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/mjpv7r4djgn7fdvhnpjwgr2rcto47mx0"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70469"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/nifi","events":[{"introduced":"e296b299805a7e3ff4c99916b79cfba16c5e4870"},{"last_affected":"e296b299805a7e3ff4c99916b79cfba16c5e4870"}],"database_specific":{"source":"CPE_STRING","cpe":"cpe:2.3:a:apache:nifi:2.11.0:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.11.0"},{"last_affected":"2.11.0"}]}}],"versions":["2.11.0","rel/nifi-2.11.0","nifi-2.11.0-RC1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-70469.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}