---
id: CVE-2026-116257
title: >-
  BillaBear Installation InstallController.php processInstall missing
  authentication
summary: >-
  A vulnerability was determined in BillaBear up to 2025.01.03. Affected by this
  issue is the function processInstall of the file
  src/BillaBear/Controller/InstallController.php of the component Installation
  Handler. This manipulation cause…
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C'
cvssSource: cna
cwe:
  - CWE-306
  - CWE-287
product: BillaBear
affected:
  - BillaBear 2025.01.03
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T10:30:14.810Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116257'
references:
  - url: 'https://vuldb.com/vuln/426296'
    label: >-
      VDB-426296 | BillaBear Installation InstallController.php processInstall
      missing authentication
  - url: 'https://vuldb.com/vuln/426296/cti'
    label: 'VDB-426296 | CTI Indicators (IOB, IOC, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-116257'
    label: CVE-2026-116257 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/1009909'
    label: >-
      Submit #1009909 | BillaBear master @
      3ac15eea19bfff1cdf60b93332b8cb9fe171d51 CWE-306 Missing Authentication for
      Critical Function
  - url: >-
      https://gist.github.com/asdfghjkl12345678910111/d9fcbcdf74b3f07c427ade9fed927ad4
tags:
  - cve.org
ingestedAt: '2026-10-26T11:24:53.914Z'
---

## Overview

A vulnerability was determined in BillaBear up to 2025.01.03. Affected by this issue is the function processInstall of the file src/BillaBear/Controller/InstallController.php of the component Installation Handler. This manipulation causes missing authentication. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

## Affected

- `BillaBear 2025.01.03`

## Remediation

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