Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| F5 | Nginx Plus | r32 |
| F5 | Nginx Open Source | >= 0.5.13, <= 0.9.7 |
Related Weaknesses (CWE)
References
- https://my.f5.com/manage/s/article/K000160382Vendor Advisory
FAQ
What is CVE-2026-27654?
CVE-2026-27654 is a vulnerability with a CVSS score of 8.2 (HIGH). 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 re...
How severe is CVE-2026-27654?
CVE-2026-27654 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-27654?
Check the references section above for vendor advisories and patch information. Affected products include: F5 Nginx Plus, F5 Nginx Open Source.