---
id: CVE-2026-100531
title: >-
  The @openclaw/slack npm package before 2026.8.1 contains an authorization flaw
  in its Slack download-file handler: when a file lacks the share metadata used
  to prove it belongs to the requested conversation, the
  conversation-authorizatio…
summary: >-
  The @openclaw/slack npm package before 2026.8.1 contains an authorization flaw
  in its Slack download-file handler: when a file lacks the share metadata used
  to prove it belongs to the requested conversation, the
  conversation-authorizatio…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-639
vendor: openclaw
product: slack
affected:
  - slack < 2026.8.1
published: '2026-09-26'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T03:16:58.513'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100531'
references:
  - url: >-
      https://github.com/openclaw/openclaw/security/advisories/GHSA-v7hh-7676-rg67
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/openclaw-slack-before-2026.8.1-authorization-bypass
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-26T03:25:24.675Z'
---

## Overview

The @openclaw/slack npm package before 2026.8.1 contains an authorization flaw in its Slack download-file handler: when a file lacks the share metadata used to prove it belongs to the requested conversation, the conversation-authorization check fails open. An authenticated caller restricted to a single conversation who knows or obtains a file identifier can therefore download file contents from outside that conversation's scope, disclosing data across configured conversation boundaries. The issue does not allow listing arbitrary Slack files and does not bypass Slack authentication itself. The issue is fixed in version 2026.8.1.

## Remediation

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