CVEvulnerability

CVE-2026-27651

8.7 HIGH Published 2026-03-24 Modified 2026-07-15 Official page ↗
Status
Modified
Published
2026-03-24
Last modified
2026-07-15
Assigner
[email protected]
CVSS 4.0 ([email protected])
8.7 HIGH — 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
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-476

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.

Affected configurations

• f5 nginx open source (>= 0.5.15 <= 0.9.7) • f5 nginx open source (>= 1.0.0 < 1.28.3) • f5 nginx open source (>= 1.29.0 < 1.29.7) • f5 nginx plus (>= r33 < r35) • f5 nginx plus r32 • f5 nginx plus r35 • f5 nginx plus r36

Related

Weakness · CWE (1)

  • CWE-476 NULL Pointer Dereference weakness

References