TI-2026-22550 Aliases CVE-2026-28215

hoppscotch Vulnerable to Unauthenticated Onboarding Config Takeover

MEDIUM 48CWE-284Published 2026-02-26 · Updated 2026-03-02

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00588 48th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed hoppscotch (hoppscotch): 2026.2.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
hoppscotch	hoppscotch	before 2026.2.0	2026.2.0	Patch available	CNA

hoppscotch Vendorhoppscotch Affected before 2026.2.0 Fixed in 2026.2.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:hoppscotch:hoppscotch::::::::	before 2026.2.0	Vulnerable	hoppscotch

cpe:2.3:a:hoppscotch:hoppscotch:*:*:*:*:*:*:*:* Versions before 2026.2.0 Vulnerable ·hoppscotch

Remediation

Fix · CNA hoppscotch (hoppscotch) Fixed in 2026.2.0

Timeline

2026-10-02 Threatist record created from CVE-2026-28215
2026-10-11 EPSS moved to the 50th–90th percentile
2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 1

https://github.com/hoppscotch/hoppscotch/security/advisories/GHSA-jwv8-867r-q9fg

Other 1

https://github.com/hoppscotch/hoppscotch/releases/tag/2026.2.0

TI-2026-36924 Mass Assignment via Onboarding Endpoint Allows Unauthenticated JWT_SECRET Overwrite CVSS 3.1CRITICAL 10.0
TI-2023-16943 Database password exposed in logs in hoppscotch CVSS 3.1HIGH 8.8
TI-2026-27155 hoppscotch: Improper loopback redirect_uri validation in device-login flow CVSS 4.0HIGH 8.5
TI-2026-22551 hoppscotch has IDOR in updateUserEnvironment / deleteUserEnvironment CVSS 3.1HIGH 8.3
TI-2026-22552 IDOR in GraphQL userCollection Query Exposes Other Users' Private Collections CVSS 3.1MEDIUM 6.5
TI-2024-17953 Content spoofing - real Hoppscotch emails CVSS 3.1MEDIUM 5.4

See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences