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CVE-2026-27654

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…

Published Mar 24, 2026CWE-122EPSS 25.07%

Overview

CVE-2026-27654 is a high-severity vulnerability. It was published on March 24, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refmy.f5.com/manage/s/article/K000160382Refaccess.redhat.com/errata/RHSA-2026:10065Refaccess.redhat.com/errata/RHSA-2026:13634Refaccess.redhat.com/errata/RHSA-2026:13680Refaccess.redhat.com/errata/RHSA-2026:13839Refaccess.redhat.com/errata/RHSA-2026:14836Refaccess.redhat.com/errata/RHSA-2026:15942Refaccess.redhat.com/errata/RHSA-2026:15943Refaccess.redhat.com/errata/RHSA-2026:15945Refaccess.redhat.com/errata/RHSA-2026:15966

How CyberStrike helps

Frequently asked questions

What is CVE-2026-27654?

CVE-2026-27654 is a high-severity vulnerability. It was published on March 24, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-27654?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-27654?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-27654?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-27654 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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