{"id":"CVE-2026-1642","details":"A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers. An attacker with a man-in-the-middle (MITM) position on the upstream server side—along with conditions beyond the attacker's control—may be able to inject plain text data into the response from an upstream proxied server.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","aliases":["BIT-nginx-2026-1642","BIT-nginx-gateway-2026-1642"],"modified":"2026-08-12T04:17:25.900644081Z","published":"2026-02-04T15:16:14.190Z","related":["ALSA-2026:3638","ALSA-2026:4235","ALSA-2026:4705","ALSA-2026:5581","ALSA-2026:5599","CGA-mpcg-76rf-hjp9","SUSE-SU-2026:1761-1","SUSE-SU-2026:1953-1","SUSE-SU-2026:21823-1","openSUSE-SU-2026:10158-1","openSUSE-SU-2026:20784-1"],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"3.4.0"},{"last_affected":"3.7.2"},{"introduced":"4.0.0"},{"last_affected":"4.0.1"},{"introduced":"5.0.0"},{"fixed":"5.3.3"}],"source":"CPE_RANGE","vendor_product":"f5:nginx_ingress_controller"},{"vendor_product":"f5:nginx_instance_manager","cpes":["cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"2.15.1"},{"last_affected":"2.21.0"}],"source":"CPE_RANGE"},{"source":"CPE_RANGE","vendor_product":"f5:nginx_plus","cpes":["cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"r33"},{"fixed":"r35"}]},{"extracted_events":[{"introduced":"r32-NA"},{"last_affected":"r32-NA"},{"introduced":"r32-p1"},{"last_affected":"r32-p1"},{"introduced":"r32-p2"},{"last_affected":"r32-p2"},{"introduced":"r32-p3"},{"last_affected":"r32-p3"},{"introduced":"r33-p1"},{"last_affected":"r33-p1"},{"introduced":"r33-p2"},{"last_affected":"r33-p2"},{"introduced":"r33-p3"},{"last_affected":"r33-p3"},{"introduced":"r34-p1"},{"last_affected":"r34-p1"},{"introduced":"r34-p2"},{"last_affected":"r34-p2"},{"introduced":"r35-NA"},{"last_affected":"r35-NA"},{"introduced":"r36-NA"},{"last_affected":"r36-NA"},{"introduced":"r36-p1"},{"last_affected":"r36-p1"}],"source":"CPE_STRING","vendor_product":"f5:nginx_plus","cpes":["cpe:2.3:a:f5:nginx_plus:r32:-:*:*:*:*:*:*","cpe:2.3:a:f5:nginx_plus:r32:p1:*:*:*:*:*:*","cpe:2.3:a:f5:nginx_plus:r32:p2:*:*:*:*:*:*","cpe:2.3:a:f5:nginx_plus:r32:p3:*:*:*:*:*:*","cpe:2.3:a:f5:nginx_plus:r33:p1:*:*:*:*:*:*","cpe:2.3:a:f5:nginx_plus:r33:p2:*:*:*:*:*:*","cpe:2.3:a:f5:nginx_plus:r33:p3:*:*:*:*:*:*","cpe:2.3:a:f5:nginx_plus:r34:p1:*:*:*:*:*:*","cpe:2.3:a:f5:nginx_plus:r34:p2:*:*:*:*:*:*","cpe:2.3:a:f5:nginx_plus:r35:-:*:*:*:*:*:*","cpe:2.3:a:f5:nginx_plus:r36:-:*:*:*:*:*:*","cpe:2.3:a:f5:nginx_plus:r36:p1:*:*:*:*:*:*"]}]},"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2026/02/05/1"},{"type":"ADVISORY","url":"https://my.f5.com/manage/s/article/K000159824"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nginx/nginx","events":[{"introduced":"479e06d88b14ea2b4512545825ccce48ca7ec028"},{"fixed":"073ed33202286a975964c3a08f522bf01dc6fecf"},{"introduced":"235f409907fd60eb2d8f6ecdc0e5cb163dd6d45f"},{"fixed":"1f57d8dc9d386b46ba7e156e25345b70843e7f55"}],"database_specific":{"extracted_events":[{"introduced":"1.3.0"},{"fixed":"1.28.2"},{"introduced":"1.29.0"},{"fixed":"1.29.5"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*"}}],"versions":["release-1.28.1","release-1.28.0","release-1.29.4","release-1.29.3","release-1.29.2","release-1.29.1","release-1.29.0","release-1.27.5","release-1.27.4","release-1.27.3","release-1.27.2","release-1.27.1","release-1.27.0","release-1.25.5","release-1.25.4","release-1.25.3","release-1.25.2","release-1.25.1","release-1.25.0","release-1.23.4","release-1.23.3","release-1.23.2","release-1.23.1","release-1.23.0","release-1.21.6","release-1.21.5","release-1.21.4","release-1.21.3","release-1.21.2","release-1.21.1","release-1.21.0","release-1.19.10","release-1.19.9","release-1.19.8","release-1.19.7","release-1.19.6","release-1.19.5","release-1.19.4","release-1.19.3","release-1.19.2","release-1.19.1","release-1.19.0","release-1.17.10","release-1.17.9","release-1.17.8","release-1.17.7","release-1.17.6","release-1.17.5","release-1.17.4","release-1.17.3","release-1.17.2","release-1.17.1","release-1.17.0","release-1.15.12","release-1.15.11","release-1.15.10","release-1.15.9","release-1.15.8","release-1.15.7","release-1.15.6","release-1.15.5","release-1.15.4","release-1.15.3","release-1.15.2","release-1.15.1","release-1.15.0","release-1.13.12","release-1.13.11","release-1.13.10","release-1.13.9","release-1.13.8","release-1.13.7","release-1.13.6","release-1.13.5","release-1.13.4","release-1.13.3","release-1.13.2","release-1.13.1","release-1.13.0","release-1.11.13","release-1.11.12","release-1.11.11","release-1.11.10","release-1.11.9","release-1.11.8","release-1.11.7","release-1.11.6","release-1.11.5","release-1.11.4","release-1.11.3","release-1.11.2","release-1.11.1","release-1.11.0","release-1.9.15","release-1.9.14","release-1.9.13","release-1.9.12","release-1.9.11","release-1.9.10","release-1.9.9","release-1.9.8","release-1.9.7","release-1.9.6","release-1.9.5","release-1.9.4","release-1.9.3","release-1.9.2","release-1.9.1","release-1.9.0","release-1.7.12","release-1.7.11","release-1.7.10","release-1.7.9","release-1.7.8","release-1.7.7","rel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