UpHeron
All vulnerabilities

Servers and applications

CVE-2026-27651

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…

Severity
High 8.7
Published
24 Mar 2026
Last changed
15 Jul 2026
Added to UpHeron
21 Oct 2026
Fixed in
1.28.3, 1.29.7
Sources
NVD

Affected software

SoftwareAffected versions
nginxServers and applications · cpe:a:f5:nginx_open_source
  • From 0.5.15 up to 0.9.7
  • From 1.0.0 before 1.28.3
  • From 1.29.0 before 1.29.7

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-27651
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-27651