CVE-2026-27654

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

25.9% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-03-24 15:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-07-15 02:19 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 25.9% in the next 30 days (EPSS).
• Severity: 8.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2026-03-24 15:16 UTC

Last modified

2026-07-15 02:19 UTC

Exploit probability

25.9% · EPSS, next 30 days

Weakness

CWE-122

Record status

Modified

Affected

• f5 nginx Plus r32
• f5 nginx Plus r33
• f5 nginx Plus r34
• f5 nginx Plus r35
• f5 nginx Plus r36
• f5 nginx Open Source ≤ 0.9.7
• f5 nginx Open Source < 1.28.3
• f5 nginx Open Source < 1.29.7

Attack profile CVSS 4.0 · 8.8

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

None

User interaction

None

Confidentiality

None

Integrity

Low

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-27654.md and follow it. Check whether this project is affected by CVE-2026-27654. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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