Bug 2450791 (CVE-2026-27651)
| Summary: | CVE-2026-27651 NGINX: NGINX: Denial of Service via undisclosed requests when ngx_mail_auth_http_module is enabled | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | Keywords: | Security |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in NGINX, specifically within the ngx_mail_auth_http_module. When this module is enabled, and CRAM-MD5 or APOP authentication is active with an authentication server that permits retries, undisclosed requests can cause NGINX worker processes to terminate. This can lead to a Denial of Service (DoS), making the affected NGINX instance unavailable to legitimate users.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2450834, 2450837, 2450838, 2450839 | ||
| Bug Blocks: | |||
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Description
OSIDB Bzimport
2026-03-24 15:02:57 UTC
This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2026:6906 https://access.redhat.com/errata/RHSA-2026:6906 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2026:6907 https://access.redhat.com/errata/RHSA-2026:6907 This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:6923 https://access.redhat.com/errata/RHSA-2026:6923 This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:7002 https://access.redhat.com/errata/RHSA-2026:7002 This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2026:7343 https://access.redhat.com/errata/RHSA-2026:7343 This issue has been addressed in the following products: Red Hat Enterprise Linux 10.0 Extended Update Support Via RHSA-2026:13634 https://access.redhat.com/errata/RHSA-2026:13634 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.6 Extended Update Support Via RHSA-2026:13680 https://access.redhat.com/errata/RHSA-2026:13680 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Extended Update Support Via RHSA-2026:13839 https://access.redhat.com/errata/RHSA-2026:13839 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2026:14836 https://access.redhat.com/errata/RHSA-2026:14836 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Via RHSA-2026:15942 https://access.redhat.com/errata/RHSA-2026:15942 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Extended Update Support Via RHSA-2026:15943 https://access.redhat.com/errata/RHSA-2026:15943 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.6 Extended Update Support Via RHSA-2026:15945 https://access.redhat.com/errata/RHSA-2026:15945 This issue has been addressed in the following products: Red Hat Enterprise Linux 9.6 Extended Update Support Via RHSA-2026:15966 https://access.redhat.com/errata/RHSA-2026:15966 |