Skip to content
Heist/ feed
Medium

Novu: Server-Side Request Forgery (SSRF) via Chat Provider Webhook URLs

Type: advisorySource: Official CVE List1 source record

Novu provides an API for sending notifications through multiple channels. Prior to 3.18.0, Novu accepts chat webhook URLs from subscriber credentials.webhookUrl, channel endpoint endpoint.url, event payload.webhookUrl, and event overrides.webhookUrl, then passes the selected endpoint.url through send-message-chat.usecase.ts to raw HTTP requests in the Slack, Discord, Mattermost, Microsoft Teams, Grafana On-Call, Ryver, Rocket.Chat, GetStream, and Zulip providers. An authenticated user can supply an internal or otherwise restricted destination because these paths do not apply normalizeOutboundHttpUrl, assertSafeOutboundUrl, or the DNS-pinned safeOutboundJsonRequest protection used by the generic webhook providers. The Novu worker can consequently issue attacker-directed POST requests to internal network services and cause interactions or actions supported by those services. This issue is fixed in version 3.18.0.

Announced Source revision 1
Original source ↗

CVE-2026-75511

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-75511

novu

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

api-service

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "novuhq",
    "product": "novu",
    "versions": [
      {
        "status": "affected",
        "version": "< 3.18.0"
      }
    ]
  },
  {
    "vendor": "@novu",
    "product": "api-service",
    "versions": [
      {
        "status": "affected",
        "version": "< 3.18.0"
      }
    ]
  }
]
Related CVEs
CVE-2026-75511

Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event
#2318 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement