---
id: CVE-2026-72846
title: >-
  Lightdash stores the webhook URL supplied with a scheduled delivery and later
  posts to it from sendWebhook in
  packages/backend/src/clients/GoogleChat/GoogleChatClient.ts and in
  packages/backend/src/clients/MicrosoftTeams/MicrosoftTeamsCl…
summary: >-
  Lightdash stores the webhook URL supplied with a scheduled delivery and later
  posts to it from sendWebhook in
  packages/backend/src/clients/GoogleChat/GoogleChatClient.ts and in
  packages/backend/src/clients/MicrosoftTeams/MicrosoftTeamsCl…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-918
vendor: lightdash
product: lightdash
affected:
  - lightdash < 1.146.4
published: '2026-08-20'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:06:30.133'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-72846'
references:
  - url: 'https://github.com/lightdash/lightdash'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/lightdash/lightdash/blob/1.146.3/packages/backend/src/clients/GoogleChat/GoogleChatClient.ts
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/lightdash/lightdash/blob/1.146.3/packages/backend/src/clients/MicrosoftTeams/MicrosoftTeamsClient.ts
    label: disclosure@vulncheck.com
  - url: 'https://github.com/lightdash/lightdash/issues/24389'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/lightdash/lightdash/releases/tag/1.146.4'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/lightdash-scheduled-delivery-webhook-urls-are-not-validated-allowing-server-side-request-forgery
    label: disclosure@vulncheck.com
  - url: 'https://github.com/lightdash/lightdash/issues/24389'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00316
epssPercentile: 0.2186
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-21T15:38:39.102270Z'
ingestedAt: '2026-09-24T15:45:56.712Z'
---

## Overview

Lightdash stores the webhook URL supplied with a scheduled delivery and later posts to it from sendWebhook in packages/backend/src/clients/GoogleChat/GoogleChatClient.ts and in packages/backend/src/clients/MicrosoftTeams/MicrosoftTeamsClient.ts. In affected versions both call fetch on the stored URL directly. The validatePublicHttpUrl helper in packages/backend/src/utils/ssrfProtection.ts, used for MCP server URLs, is not applied on either path, and the webhook fields carry no server-side URL constraint. A user able to create or trigger a scheduled delivery can therefore direct the server to issue POST requests to private, loopback and link-local addresses, including cloud metadata endpoints, and can distinguish reachable internal services from unreachable ones through the resulting errors. The upstream response is never returned to the requester; on a failure status its body is written to the server log instead. Version 1.146.4 routes both clients through postSchedulerWebhook from packages/backend/src/utils/schedulerWebhookValidation rather than calling fetch directly.

## Remediation

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