Description

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.

INFO

Published Date :

2026-03-24T14:13:27.295Z

Last Modified :

2026-03-24T15:14:13.220Z

Source :

f5
AFFECTED PRODUCTS

The following products are affected by CVE-2026-27651 vulnerability.

Vendors Products
F5
  • Nginx Open Source
  • Nginx Plus
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-27651.

URL Resource
https://my.f5.com/manage/s/article/K000160383 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-27651 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-27651 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact