CVE-2026-34847 hoppscotch: Open redirect via `/enter?redirect=`
An attacker can redirect users to malicious sites via the /enter page's redirect parameter in the hoppscotch API development tool.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-34847?
CVE-2026-34847 is a medium-severity vulnerability in hoppscotch, published on 2 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
hoppscotch is an open source API development ecosystem. Prior to version 2026.3.0, the /enter page contains a DOM-based open redirect vulnerability. The redirect query parameter is directly used to construct a URL and redirect the user without proper validation. This issue has been patched in version 2026.3.0.
Weakness: CWE-601
Which versions are affected by CVE-2026-34847?
It affects 1 product.
Products include Hoppscotch Hoppscotch.
How do I fix CVE-2026-34847?
No fix has been published for CVE-2026-34847 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-34847 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34847 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in hoppscotch
- CVE-2026-50160 Mass Assignment via Onboarding Endpoint Allows Unauthenticated JWT_SECRET Overwrite
- CVE-2026-28215 hoppscotch Vulnerable to Unauthenticated Onboarding Config Takeover
- CVE-2026-34931 hoppscotch: Improper loopback redirect_uri validation in device-login flow
- CVE-2026-34932 hoppscotch: Stored XSS via mock server responses on backend origin
- CVE-2026-28216 hoppscotch has IDOR in updateUserEnvironment / deleteUserEnvironment
Sources
Also known as GHSA-27pm-c9ch-746q.