NGINX
CVE-2026-27654: NGINX ngx_http_dav_module vulnerability
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.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| NGINX Open Source 1.29 | 1.29.7 or later |
| NGINX Open Source 0.5 | 1.28.3 or later |
| NGINX Plus R36 | R36 P3 or later |
| NGINX Plus R35 | R35 P2 or later |
| NGINX Plus R34 | * or later |
| NGINX Plus R33 | * or later |
| NGINX Plus R32 | R32 P5 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 12 Oct 2026.