Github
CVE-2026-28215
CRITICAL
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
3DescriptionGitHub Advisory
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.
AnalysisAI
Unauthenticated infrastructure overwrite in Hoppscotch API development ecosystem before 2026.2.0. Attackers can overwrite the entire infrastructure configuration. PoC available.
Technical ContextAI
CWE-284 improper access control on infrastructure configuration endpoints. Unauthenticated attackers can overwrite critical settings.
RemediationAI
Update to Hoppscotch 2026.2.0.
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External POC / Exploit Code
Leaving vuln.today