---
id: "CVE-2026-126807"
page: "https://infrastack.ai/live/CVE-2026-126807"
kind: "vulnerability"
aliases: ["CVE-2026-126807"]
title: "WuzAPI: authenticated users can read other tenants' chat metadata"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["multi-tenant", "other", "self-hosted", "whatsapp", "wuzapi"]
not_affected_if: ["message-history-disabled", "single-tenant"]
published_at: "2026-11-11T21:16:44+00:00"
first_seen_at: "2026-11-11T21:29:08+00:00"
updated_at: "2026-11-11T21:30:56+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126807", "first_seen_at": "2026-11-11T21:29:08+00:00"}]
exploit_sources: []
---

# WuzAPI: authenticated users can read other tenants' chat metadata

Link for people: https://infrastack.ai/live/CVE-2026-126807 (this .md is for agents)

WuzAPI through 1.1.0 has a GetHistory handler flaw that lets any logged-in user see other tenants' chat metadata. An attacker with message history enabled can list every user's internal ID, stored chat JIDs and last-message times via GET /chat/history with chat_jid=index.

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

## How to check

- Check the WuzAPI version in use; affected versions are those through `1.1.0`.
- Check whether message history is enabled in the WuzAPI configuration.

## Fix

- Patch available on github.com, per the linked fix; the fixed version is unknown from the sources.

## Timeline

- 2026-11-11T21:29:08+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126807

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/wuzapi-through-1.1.0-cross-tenant-information-disclosure-via-chat-history
- [fix] Patch: github.com https://github.com/asternic/wuzapi/commit/f5332fa21b7c8a742f9ee565328ea776ad0c8040

## From the sources

WuzAPI through 1.1.0 contains a cross-tenant information disclosure vulnerability in the GetHistory handler that allows authenticated users to view other tenants' chat metadata. Attackers with message history enabled can request GET /chat/history with chat_jid=index to list every user's internal ID, stored chat JIDs, and last-message times.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_