VDB

DEBIAN-CVE-2026-27651

DEBIAN-CVE-2026-27651 PUBLISHED CVSS 7.5 HIGH

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.

Risk Scores

CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products

VendorProductVersions
Debian:11nginx1.28.0-3, 1.28.0-4, 1.28.0-5
Debian:12nginx0, 1.22.1-9+deb12u1, 1.22.1-9+deb12u2
Debian:14nginx0, 1.26.3-3, 1.28.0-1
Debian:13nginx1.28.0-2, 1.26.3-3+deb13u2, 1.28.0-1

Timeline

  • Mar 24, 2026 CVE Published
  • May 16, 2026 CVE Updated
  • May 21, 2026 PoC Published
  • Jun 10, 2026 PoC Published
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