---
id: CVE-2026-115971
title: Travisun Opptrix preParsing handler webhook Buffer.concat denial of service
summary: >-
  A vulnerability was found in Travisun Opptrix 0.4.0. Affected is the function
  Buffer.concat of the file /api/channels/webhook/ of the component preParsing
  handler. Performing a manipulation results in denial of service. The attack
  can be…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R'
cvssSource: cna
cwe:
  - CWE-404
vendor: Travisun
product: Opptrix
affected:
  - Opptrix 0.4.0
published: '2026-10-24'
updated: '2026-10-24'
sourceUpdated: '2026-10-24T17:30:17.983Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-115971'
references:
  - url: 'https://vuldb.com/vuln/426052'
    label: >-
      VDB-426052 | Travisun Opptrix preParsing handler webhook Buffer.concat
      denial of service
  - url: 'https://vuldb.com/vuln/426052/cti'
    label: 'VDB-426052 | CTI Indicators (IOB, IOC, TTP, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-115971'
    label: CVE-2026-115971 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/992175'
    label: 'Submit #992175 | Opptrix Opptrix Server v0.4.0 Denial of Service'
  - url: >-
      https://drive.google.com/drive/folders/1-crbh2joNwFbpXSQ4Iz1U0dSPy4ZTSf_?usp=sharing
tags:
  - cve.org
ingestedAt: '2026-10-24T18:04:02.423Z'
---

## Overview

A vulnerability was found in Travisun Opptrix 0.4.0. Affected is the function Buffer.concat of the file /api/channels/webhook/ of the component preParsing handler. Performing a manipulation results in denial of service. The attack can be initiated remotely. The exploit has been made public and could be used. The project has been completely taken offline and deprecated. The project maintainer explains: "The mentioned security risk was a design flaw that manifested primarily in local environments during earlier stages of version development. We previously addressed and resolved this specific risk; however, because the project was restricted to a small learning scope and the main versions were intended to run exclusively on localhost, the security fix was only pushed directly to our GitHub repository before it went private." This vulnerability only affects products that are no longer supported by the maintainer.

## Affected

- `Opptrix 0.4.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.