---
id: "CVE-2026-111653"
kind: "vulnerability"
aliases: ["CVE-2026-111653"]
title: "53AIHub: unauthenticated PUT overwrites any enterprise profile and branding"
severity: "medium"
cvss: 6.9
epss: null
exploited: false
status: "open"
category: "ai-tooling"
products: []
ecosystems: []
tags: ["53aihub", "ai-tooling", "saas", "self-hosted"]
not_affected_if: ["default-config"]
published_at: "2026-10-16T18:17:46+00:00"
first_seen_at: "2026-10-23T21:57:13+00:00"
updated_at: "2026-10-25T03:42:26+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111653", "first_seen_at": "2026-10-23T21:57:13+00:00"}]
---

# 53AIHub: unauthenticated PUT overwrites any enterprise profile and branding

53AIHub through 0.5.3 lets unauthenticated attackers send PUT requests to /api/enterprises/:id and overwrite any enterprise's profile. Attackers can enumerate sequential enterprise IDs to change logos, display names and branding for defacement or phishing.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed 53AIHub version; the sources say versions through 0.5.3 are affected.
- Check whether the deployment runs with `IS_SAAS` enabled, since the sources say the authorization checks only apply when it is true.
- Look for unauthenticated PUT requests to `/api/enterprises/:id` in web server or proxy logs.

## Fix

- Upgrade 53AIHub past `0.5.3`; the sources do not name a fixed version, so check the vendor release notes.
- Until patched, block or require authentication on PUT `/api/enterprises/:id` at the reverse proxy.

## Timeline

- 2026-10-23T21:57:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111653

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_