# CVE-2026-72846: Lightdash Scheduled Delivery Webhook URLs Are Not Validated, Allowing Server-Side Request Forgery

> CVE-2026-72846: Lightdash Scheduled Delivery Webhook URLs Are Not Validated, Allowing Server-Side Request Forgery. CVSS 6.4 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-72846
Last updated: 2026-10-08T16:17:36Z

- Published: 2026-08-20 21:57 UTC · Updated: 2026-10-08 16:17 UTC · Assigner: VulnCheck
- CVSS: 6.4 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- EPSS: 0.32%, 24th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-918

## Description

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.

## Affected vendors and products

- lightdash: lightdash

## Tracked companies

- [Lightdash](https://rewindex.com/company/lightdash.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-72846)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-72846)
- [https://github.com/lightdash/lightdash](https://github.com/lightdash/lightdash)
- [https://github.com/lightdash/lightdash/blob/1.146.3/packages/backend/src/clients/GoogleChat/GoogleChatClient.ts](https://github.com/lightdash/lightdash/blob/1.146.3/packages/backend/src/clients/GoogleChat/GoogleChatClient.ts)
- [https://github.com/lightdash/lightdash/blob/1.146.3/packages/backend/src/clients/MicrosoftTeams/MicrosoftTeamsClient.ts](https://github.com/lightdash/lightdash/blob/1.146.3/packages/backend/src/clients/MicrosoftTeams/MicrosoftTeamsClient.ts)
- [https://github.com/lightdash/lightdash/issues/24389](https://github.com/lightdash/lightdash/issues/24389)
- [https://github.com/lightdash/lightdash/releases/tag/1.146.4](https://github.com/lightdash/lightdash/releases/tag/1.146.4)
- [https://www.vulncheck.com/advisories/lightdash-scheduled-delivery-webhook-urls-are-not-validated-allowing-server-side-request-forgery](https://www.vulncheck.com/advisories/lightdash-scheduled-delivery-webhook-urls-are-not-validated-allowing-server-side-request-forgery)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-72846 · Markdown: https://rewindex.com/cve/CVE-2026-72846.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-72846 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:23.677Z