---
title: "CVE-2026-15176: NGINX - Buffer Overflow"
description: "NGINX Plus and NGINX Open Source contain a heap buffer overflow caused by use of alias directive with rewrite and set or return referencing $request_filename, letting unauthenticated attackers cause DoS or code execution, exploit requires crafted HTTP requests."
url: https://panop.io/threat-heartbeat/CVE-2026-15176/
---

# CVE-2026-15176 NGINX - Buffer Overflow

NGINX Plus and NGINX Open Source contain a heap buffer overflow caused by use of alias directive with rewrite and set or return referencing $request\_filename, letting unauthenticated attackers cause DoS or code execution, exploit requires crafted HTTP requests.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-15176)

## Details

Type

Buffer Overflow

Impact

Denial Of Service, Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

14 October 2026

Updated

15 October 2026

Weakness

[CWE-122](https://cwe.mitre.org/data/definitions/122.html)

## Vendor fix

Update to the latest supported version of NGINX Plus or NGINX Open Source.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-15176](https://nvd.nist.gov/vuln/detail/CVE-2026-15176)
- [https://my.f5.com/manage/s/article/K000162416](https://my.f5.com/manage/s/article/K000162416)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)