CVE-2026-59721: Hoppscotch

High severity, CVSS 7.2. EPSS: 1% chance of exploitation in the next 30 days.

Hoppscotch is an open source API development ecosystem. Prior to 2026.6.0, the updateInfraConfigs GraphQL mutation in admin/infra.resolver.ts accepts an attacker-controlled MAILER_SMTP_URL value, and validateSMTPUrl in utils.ts permits path, query, or fragment content that nodemailer parses into sendmail transport options, allowing an admin to execute arbitrary commands as root in the backend container after restart and mail sending. This issue is fixed in version 2026.6.0.

Affected products

• Hoppscotch Hoppscotch: before 2026.6.0 (fixed in 2026.6.0)

Published 2026-07-09. Last modified 2026-07-10.