CVE-2026-27654

Description

NGINX Open Source and NGINX Plus have a vulnerability in the ngx_http_dav_module module that might allow an attacker to trigger a buffer overflow to the NGINX worker process; this vulnerability may result in termination of the NGINX worker process or modification of source or destination file names outside the document root. This issue affects NGINX Open Source and NGINX Plus when the configuration file uses DAV module MOVE or COPY methods, prefix location (nonregular expression location configuration), and alias directives. The integrity impact is constrained because the NGINX worker process user has low privileges and does not have access to the entire system. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27654.json

https://my.f5.com/manage/s/article/K000160382

https://bugzilla.redhat.com/show_bug.cgi?id=2450776

https://access.redhat.com/security/cve/CVE-2026-27654

https://access.redhat.com/errata/RHSA-2026:8346

https://access.redhat.com/errata/RHSA-2026:7343

https://access.redhat.com/errata/RHSA-2026:7002

https://access.redhat.com/errata/RHSA-2026:6923

https://access.redhat.com/errata/RHSA-2026:6907

https://access.redhat.com/errata/RHSA-2026:6906

https://access.redhat.com/errata/RHSA-2026:15966

https://access.redhat.com/errata/RHSA-2026:15945

https://access.redhat.com/errata/RHSA-2026:15943

https://access.redhat.com/errata/RHSA-2026:15942

https://access.redhat.com/errata/RHSA-2026:14836

https://access.redhat.com/errata/RHSA-2026:13839

https://access.redhat.com/errata/RHSA-2026:13680

https://access.redhat.com/errata/RHSA-2026:13634

https://access.redhat.com/errata/RHSA-2026:10065

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4

EPSS