{"id":"ALPINE-CVE-2026-28753","details":"NGINX Plus and NGINX Open Source have a vulnerability in the ngx_mail_smtp_module module due to the improper handling of CRLF sequences in DNS responses. This allows an attacker-controlled DNS server to inject arbitrary headers into SMTP upstream requests, leading to potential request manipulation. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","modified":"2026-03-26T15:32:02.768506Z","published":"2026-03-24T15:16:33.560Z","upstream":["CVE-2026-28753"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2026-28753"}],"affected":[{"package":{"name":"nginx","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/nginx?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28.3-r0"}]}],"versions":["0.8.53-r0","0.8.54-r0","0.8.54-r1","1.0.11-r0","1.0.11-r1","1.0.14-r0","1.0.15-r0","1.0.4-r0","1.0.4-r1","1.0.5-r0","1.10.0-r0","1.10.1-r0","1.10.1-r1","1.10.1-r2","1.10.1-r3","1.10.1-r4","1.10.1-r5","1.10.1-r6","1.10.1-r7","1.10.1-r8","1.10.1-r9","1.10.2-r0","1.10.2-r1","1.10.3-r0","1.10.3-r1","1.10.3-r2","1.10.3-r3","1.10.3-r4","1.10.3-r5","1.12.0-r0","1.12.0-r1","1.12.0-r2","1.12.1-r0","1.12.1-r1","1.12.1-r2","1.12.1-r3","1.12.2-r0","1.12.2-r1","1.12.2-r2","1.12.2-r3","1.12.2-r4","1.12.2-r5","1.12.2-r6","1.14.0-r0","1.14.0-r1","1.14.0-r2","1.14.1-r0","1.14.2-r0","1.14.2-r1","1.16.0-r0","1.16.0-r1","1.16.0-r2","1.16.0-r3","1.16.0-r4","1.16.1-r0","1.16.1-r1","1.16.1-r2","1.16.1-r3","1.16.1-r4","1.16.1-r5","1.16.1-r6","1.16.1-r7","1.16.1-r8","1.18.0-r0","1.18.0-r1","1.18.0-r10","1.18.0-r11","1.18.0-r12","1.18.0-r13","1.18.0-r14","1.18.0-r15","1.18.0-r2","1.18.0-r3","1.18.0-r4","1.18.0-r5","1.18.0-r6","1.18.0-r7","1.18.0-r8","1.18.0-r9","1.2.2-r0","1.2.3-r0","1.2.4-r0","1.2.5-r0","1.2.6-r0","1.2.7-r0","1.2.8-r0","1.20.0-r0","1.20.1-r0","1.20.1-r1","1.20.1-r10","1.20.1-r11","1.20.1-r12","1.20.1-r13","1.20.1-r2","1.20.1-r3","1.20.1-r4","1.20.1-r5","1.20.1-r6","1.20.1-r7","1.20.1-r8","1.20.1-r9","1.20.2-r0","1.20.2-r1","1.20.2-r2","1.22.0-r0","1.22.0-r1","1.22.0-r2","1.22.0-r3","1.22.0-r4","1.22.0-r5","1.22.0-r6","1.22.0-r7","1.22.0-r8","1.22.1-r0","1.22.1-r1","1.22.1-r2","1.24.0-r0","1.24.0-r1","1.24.0-r10","1.24.0-r11","1.24.0-r12","1.24.0-r13","1.24.0-r14","1.24.0-r15","1.24.0-r16","1.24.0-r17","1.24.0-r18","1.24.0-r19","1.24.0-r2","1.24.0-r20","1.24.0-r3","1.24.0-r4","1.24.0-r5","1.24.0-r6","1.24.0-r7","1.24.0-r8","1.24.0-r9","1.26.0-r0","1.26.0-r1","1.26.0-r2","1.26.1-r0","1.26.1-r1","1.26.1-r2","1.26.1-r3","1.26.2-r0","1.26.2-r1","1.26.2-r2","1.26.2-r3","1.26.2-r4","1.26.3-r0","1.26.3-r1","1.26.3-r2","1.26.3-r3","1.26.3-r4","1.28.0-r0","1.28.0-r1","1.28.0-r2","1.28.0-r3","1.28.2-r0","1.4.0-r0","1.4.0-r1","1.4.1-r0","1.4.2-r0","1.4.2-r1","1.4.3-r0","1.4.3-r1","1.4.4-r0","1.4.4-r1","1.4.4-r2","1.4.5-r0","1.4.6-r0","1.4.7-r0","1.6.0-r0","1.6.0-r1","1.6.0-r2","1.6.0-r3","1.6.1-r0","1.6.1-r1","1.6.2-r0","1.6.2-r1","1.6.2-r2","1.6.2-r3","1.6.3-r0","1.8.0-r0","1.8.0-r1","1.8.0-r2","1.8.0-r3","1.8.1-r0","1.8.1-r1","1.9.11-r0","1.9.14-r0","1.9.14-r1"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-28753.json"}},{"package":{"name":"nginx","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/nginx?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28.3-r0"}]}],"versions":["0.8.53-r0","0.8.54-r0","0.8.54-r1","1.0.11-r0","1.0.11-r1","1.0.14-r0","1.0.15-r0","1.0.4-r0","1.0.4-r1","1.0.5-r0","1.10.0-r0","1.10.1-r0","1.10.1-r1","1.10.1-r2","1.10.1-r3","1.10.1-r4","1.10.1-r5","1.10.1-r6","1.10.1-r7","1.10.1-r8","1.10.1-r9","1.10.2-r0","1.10.2-r1","1.10.3-r0","1.10.3-r1","1.10.3-r2","1.10.3-r3","1.10.3-r4","1.10.3-r5","1.12.0-r0","1.12.0-r1","1.12.0-r2","1.12.1-r0","1.12.1-r1","1.12.1-r2","1.12.1-r3","1.12.2-r0","1.12.2-r1","1.12.2-r2","1.12.2-r3","1.12.2-r4","1.12.2-r5","1.12.2-r6","1.14.0-r0","1.14.0-r1","1.14.0-r2","1.14.1-r0","1.14.2-r0","1.14.2-r1","1.16.0-r0","1.16.0-r1","1.16.0-r2","1.16.0-r3","1.16.0-r4","1.16.1-r0","1.16.1-r1","1.16.1-r2","1.16.1-r3","1.16.1-r4","1.16.1-r5","1.16.1-r6","1.16.1-r7","1.16.1-r8","1.18.0-r0","1.18.0-r1","1.18.0-r10","1.18.0-r11","1.18.0-r12","1.18.0-r13","1.18.0-r14","1.18.0-r15","1.18.0-r2","1.18.0-r3","1.18.0-r4","1.18.0-r5","1.18.0-r6","1.18.0-r7","1.18.0-r8","1.18.0-r9","1.2.2-r0","1.2.3-r0","1.2.4-r0","1.2.5-r0","1.2.6-r0","1.2.7-r0","1.2.8-r0","1.20.0-r0","1.20.1-r0","1.20.1-r1","1.20.1-r10","1.20.1-r11","1.20.1-r12","1.20.1-r13","1.20.1-r2","1.20.1-r3","1.20.1-r4","1.20.1-r5","1.20.1-r6","1.20.1-r7","1.20.1-r8","1.20.1-r9","1.20.2-r0","1.20.2-r1","1.20.2-r2","1.22.0-r0","1.22.0-r1","1.22.0-r2","1.22.0-r3","1.22.0-r4","1.22.0-r5","1.22.0-r6","1.22.0-r7","1.22.0-r8","1.22.1-r0","1.22.1-r1","1.22.1-r2","1.24.0-r0","1.24.0-r1","1.24.0-r10","1.24.0-r11","1.24.0-r12","1.24.0-r13","1.24.0-r14","1.24.0-r15","1.24.0-r16","1.24.0-r17","1.24.0-r18","1.24.0-r19","1.24.0-r2","1.24.0-r20","1.24.0-r3","1.24.0-r4","1.24.0-r5","1.24.0-r6","1.24.0-r7","1.24.0-r8","1.24.0-r9","1.26.0-r0","1.26.0-r1","1.26.0-r2","1.26.1-r0","1.26.1-r1","1.26.1-r2","1.26.1-r3","1.26.2-r0","1.26.2-r1","1.26.2-r2","1.26.2-r3","1.26.2-r4","1.26.3-r0","1.26.3-r1","1.26.3-r2","1.26.3-r3","1.26.3-r4","1.28.0-r0","1.28.0-r1","1.28.0-r2","1.28.0-r3","1.28.0-r4","1.28.0-r5","1.28.0-r6","1.28.0-r7","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