---
id: CVE-2026-111653
title: '53AIHub through 0.5.3 Missing Authentication via PUT /api/enterprises/:id'
summary: >-
  53AIHub through 0.5.3 contains a missing authentication vulnerability that
  allows unauthenticated attackers to overwrite any enterprise's profile by
  sending PUT requests to /api/enterprises/:id. Because UpdateEnterprise only
  enforces che…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-306
vendor: 53AI
product: 53AIHub
affected:
  - 53AIHub <= 0.5.3
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T17:39:20.030Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111653'
references:
  - url: >-
      https://hackmd.io/@hieuPenguinnn/53aihub-unauth-cross-tenant-enterprise-update
  - url: 'https://github.com/53AI/53AIHub/blob/v0.5.3/api/router/api.go#L54-L66'
  - url: >-
      https://github.com/53AI/53AIHub/blob/v0.5.3/api/controller/enterprise.go#L122-L160
  - url: >-
      https://www.vulncheck.com/advisories/53aihub-through-0.5.3-missing-authentication-via-put-api-enterprises-id
    label: >-
      VulnCheck Advisory: 53AIHub through 0.5.3 Missing Authentication via PUT
      /api/enterprises/:id
tags:
  - cve.org
ingestedAt: '2026-10-16T18:43:08.676Z'
---

## Overview

53AIHub through 0.5.3 contains a missing authentication vulnerability that allows unauthenticated attackers to overwrite any enterprise's profile by sending PUT requests to /api/enterprises/:id. Because UpdateEnterprise only enforces checks when IS_SAAS is true, attackers can enumerate sequential enterprise IDs and overwrite logos, display names and branding for defacement and phishing.

## Affected

- `53AIHub <= 0.5.3`

## Remediation

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