Lightdash up to 1.146.3 Webhook Delivery GoogleChatClient.ts sendWebhook webhook server-side request forgery

Summaryinfo

A vulnerability categorized as critical has been discovered in Lightdash up to 1.146.3. Affected by this vulnerability is the function sendWebhook of the file packages/backend/src/clients/GoogleChat/GoogleChatClient.ts of the component Webhook Delivery. The manipulation of the argument webhook results in server-side request forgery. This vulnerability is cataloged as CVE-2026-72846. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Lightdash up to 1.146.3. It has been classified as critical. Affected is the function sendWebhook of the file packages/backend/src/clients/GoogleChat/GoogleChatClient.ts of the component Webhook Delivery. The manipulation of the argument webhook with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-72846 since 08/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit.

Upgrading to version 1.146.4 eliminates this vulnerability.

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Productinfo

Name

• Lightdash

Version

• 1.146.0
• 1.146.1
• 1.146.2
• 1.146.3

Website

• Product: https://github.com/lightdash/lightdash/

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