HIGHCVE-2026-27651Published Modified CNA f5
CVE-2026-27651: NGINX ngx_mail_auth_http_module vulnerability
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.
Metrics
- CVSS v4.0
- 8.7
- Severity
- HIGH
- Fixed in
- *
- Affected Products
- 2
Fix available
*1.28.31.29.7R32 P5R35 P2R36 P3
Affected packages
- F5 / NGINX Open Source< 1.29.7 (from 1.29.0) · < 1.28.3 (from 0.5.15)
- F5 / NGINX Plus< R36 P3 (from R36) · < R35 P2 (from R35) · < * (from R34) · < * (from R33) · < R32 P5 (from R32)
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NReferences