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CVE-2026-28215— hoppscotch Vulnerable to Unauthenticated Onboarding Config Takeover

Quick assessment

Affected
hoppscotch hoppscotch
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hoppscotch是Hoppscotch开源的一个开源 Api 开发生态系统。 Hoppscotch 2026.2.0之前版本存在授权问题漏洞，该漏洞源于未经验证的攻击者可通过单个HTTP POST请求覆盖整个基础设施配置，可能导致OAuth凭据和SMTP密码泄露。

CVSS 9.1 · Critical EPSS 0.66% · P50
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I. Basic Information for CVE-2026-28215

Vulnerability Information
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Vulnerability Title
hoppscotch Vulnerable to Unauthenticated Onboarding Config Takeover
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Hoppscotch 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hoppscotch是Hoppscotch开源的一个开源 Api 开发生态系统。 Hoppscotch 2026.2.0之前版本存在授权问题漏洞，该漏洞源于未经验证的攻击者可通过单个HTTP POST请求覆盖整个基础设施配置，可能导致OAuth凭据和SMTP密码泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
hoppscotch hoppscotch < 2026.2.0 -

II. Public POCs for CVE-2026-28215

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III. Intelligence Information for CVE-2026-28215

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Vendor Advisories for CVE-2026-28215 (1)

Same Patch Batch · hoppscotch · 2026-02-26 · 3 CVEs total

CVE-2026-28216 8.3 HIGH hoppscotch has IDOR in updateUserEnvironment / deleteUserEnvironment
CVE-2026-28217 6.5 MEDIUM IDOR in GraphQL userCollection Query Exposes Other Users' Private Collections

IV. Related Vulnerabilities

Same product: hoppscotch
Same vendor: hoppscotch
Same weakness: CWE-284

V. Comments for CVE-2026-28215

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