Exploitation Summary
EIP tracks 6 public exploits for CVE-2026-27654. PoCs published by hhhell, Debajyoti0-0, dead-lamer.
AI-analyzed exploit summary This repository contains a functional exploit for CVE-2026-27654, a heap buffer overflow in nginx's WebDAV module caused by an integer underflow in `ngx_http_map_uri_to_path()`. The exploit achieves unauthenticated arbitrary file write (directory traversal) via crafted PUT and COPY requests, leading to remote code execution when a PHP webshell is deployed.
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.
Exploits (6)
This repository contains a functional exploit for CVE-2026-27654, a heap buffer overflow in nginx's WebDAV module caused by an integer underflow in `ngx_http_map_uri_to_path()`. The exploit achieves unauthenticated arbitrary file write (directory traversal) via crafted PUT and COPY requests, leading to remote code execution when a PHP webshell is deployed.
This PoC exploits a size_t underflow vulnerability in nginx's ngx_http_dav_module (CVE-2026-27654) when handling MOVE/COPY requests with crafted Destination headers. The flaw leads to a heap buffer overflow, enabling remote DoS or potential RCE under specific conditions.
This PoC exploits a size_t underflow vulnerability in nginx's ngx_http_dav_module (CVE-2026-27654) when handling MOVE/COPY requests with crafted Destination headers. The flaw causes a heap buffer overflow via improper length calculation during alias path comparison, leading to potential RCE or DoS.
The repository contains a PDF document detailing CVE-2026-27654, referencing a CWE-122 (Heap-based Buffer Overflow) vulnerability. The PDF appears to be a technical writeup, but no executable exploit code is present.
This repository contains a functional Python PoC for CVE-2026-27654, a heap buffer overflow in nginx's ngx_http_dav_module caused by a size_t underflow. The exploit sends a crafted MOVE request to trigger the vulnerability, leading to a worker process crash (DoS).
This repository contains a functional exploit PoC for CVE-2026-27654, a heap buffer overflow in NGINX's `ngx_http_dav_module` caused by a `size_t` underflow when processing crafted `MOVE` or `COPY` requests. The PoC demonstrates the vulnerability by triggering a crash in vulnerable NGINX versions (0.5.13 through 1.28.2 and 1.29.0 through 1.29.6) compiled with `--with-http_dav_module` and using `alias` in the DAV location.
References (19)
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H