{"id":"CVE-2026-70469","aliases":["BIT-nifi-2026-70469","EUVD-2026-81079","GHSA-56vg-25rp-h2c5"],"status":"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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-09","score":0.00622,"percentile":0.50103,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-409"],"published":"2026-09-16T19:38:42Z","modified":"2026-10-28T02:30:43Z","fixes":[{"ecosystem":"Bitnami","package":"nifi","fixed_in":["2.12.0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"nifi","ranges":[{"type":"SEMVER","events":[{"introduced":"2.11.0"},{"fixed":"2.12.0"}]}]}],"products":[{"vendor":"apache","product":"nifi"},{"vendor":"apache software foundation","product":"apache nifi"}],"references":[{"url":"https://lists.apache.org/thread/mjpv7r4djgn7fdvhnpjwgr2rcto47mx0","tags":["vendor-advisory","Mailing List","Vendor Advisory","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/16/7","tags":["Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70469","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-56vg-25rp-h2c5"},{"url":"https://repo.maven.apache.org/maven2","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70469.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-70469","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.","status":"published","published":"2026-09-16T19:38:42.341Z","modified":"2026-09-17T19:38:26.785Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-409"],"updated_at":"2026-11-02T13:35:22.169514Z"}],"euvd":[{"id":"EUVD-2026-81079","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.","status":"published","published":"2026-09-16T19:38:42Z","modified":"2026-09-17T19:38:26Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T17:28:09.684322Z"}],"ghsa":[{"id":"GHSA-56vg-25rp-h2c5","title":"Apache NiFi 2.11.0 disabled support for gzip-encoded HTTP requests for the application REST API...","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.","status":"published","published":"2026-09-16T21:32:46Z","modified":"2026-09-17T21:32:42Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-409"],"updated_at":"2026-11-02T15:12:08.779152Z"}],"nvd":[{"id":"CVE-2026-70469","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.","status":"published","published":"2026-09-16T20:17:26.877Z","modified":"2026-09-21T13:42:42.46Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-409"],"updated_at":"2026-11-02T14:12:48.630594Z"}],"osv":[{"id":"CVE-2026-70469","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.","status":"published","published":"2026-09-16T19:38:42.341Z","modified":"2026-10-28T02:30:43.027167187Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-409"],"updated_at":"2026-11-02T15:45:15.164658Z"},{"id":"BIT-nifi-2026-70469","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.","status":"published","published":"2026-09-22T08:50:56.153Z","modified":"2026-09-25T14:15:14.777285955Z","updated_at":"2026-11-02T15:28:34.007508Z"}]}}