Vulnerability Description
hoppscotch is an open source API development ecosystem. Prior to version 2026.2.0, an unauthenticated attacker can overwrite the entire infrastructure configuration of a self-hosted Hoppscotch instance including OAuth provider credentials and SMTP settings by sending a single HTTP POST request with no authentication. The endpoint POST /v1/onboarding/config has no authentication guard and performs no check on whether onboarding was already completed. A successful exploit allows the attacker to replace the instance's Google/GitHub/Microsoft OAuth application credentials with their own, causing all subsequent user logins via SSO to authenticate against the attacker's OAuth app. The attacker captures OAuth tokens and email addresses of every user who logs in after the exploit. Additionally, the endpoint returns a recovery token that can be used to read all stored secrets in plaintext, including SMTP passwords and any other configured credentials. Version 2026.2.0 fixes the issue.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Hoppscotch | Hoppscotch | < 2026.2.0 |
Related Weaknesses (CWE)
References
- https://github.com/hoppscotch/hoppscotch/releases/tag/2026.2.0ProductRelease Notes
- https://github.com/hoppscotch/hoppscotch/security/advisories/GHSA-jwv8-867r-q9fgExploitVendor Advisory
FAQ
What is CVE-2026-28215?
CVE-2026-28215 is a vulnerability with a CVSS score of 9.1 (CRITICAL). hoppscotch is an open source API development ecosystem. Prior to version 2026.2.0, an unauthenticated attacker can overwrite the entire infrastructure configuration of a self-hosted Hoppscotch instanc...
How severe is CVE-2026-28215?
CVE-2026-28215 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-28215?
Check the references section above for vendor advisories and patch information. Affected products include: Hoppscotch Hoppscotch.