{"id":"BIT-nginx-2026-27651","summary":"NGINX ngx_mail_auth_http_module vulnerability","details":"When the ngx_mail_auth_http_module module is enabled on NGINX Plus or NGINX Open Source, undisclosed requests can cause worker processes to terminate. This issue may occur when (1) CRAM-MD5 or APOP authentication is enabled, and (2) the authentication server permits retry by returning the Auth-Wait response header. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","aliases":["BIT-nginx-gateway-2026-27651","CVE-2026-27651"],"modified":"2026-09-08T08:48:16.869863670Z","published":"2026-03-27T07:10:02.387Z","database_specific":{"cpes":["cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*"],"severity":"High"},"references":[{"type":"ADVISORY","url":"https://my.f5.com/manage/s/article/K000160383"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27651"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:10065"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:13634"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:13680"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:13839"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:14836"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:15942"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:15943"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:15945"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:15966"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:6906"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:6907"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:6923"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:7002"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:7343"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:8346"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-27651"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2450791"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27651.json"}],"affected":[{"package":{"name":"nginx","ecosystem":"Bitnami","purl":"pkg:bitnami/nginx"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.5.15"},{"fixed":"1.28.3"},{"introduced":"1.29.0"},{"fixed":"1.29.7"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/nginx/BIT-nginx-2026-27651.json"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.9.0"}