CVE-2026-31974

OpenProject is an open-source, web-based project management software. Prior to 17.2.0, OpenProject SMTP test endpoint POST /admin/settings/mailnotifications accepts arbitrary host and port values and exhibits measurable differences in response behaviour depending on whether the target IP exists a...

CVE-2026-31974

OpenProject is an open-source, web-based project management software. Prior to 17.2.0, OpenProject SMTP test endpoint POST /admin/settings/mailnotifications accepts arbitrary host and port values and exhibits measurable differences in response behaviour depending on whether the target IP exists a...

CVE-2026-31974

OpenProject prior to 17.2.0 is affected by an SSRF vulnerability via the SMTP test endpoint (POST /admin/settings/mail_notifications) and via webhooks, where arbitrary host/port values enable timing and error differences to map internal hosts and reachable services/ports. Root cause: improper han...