Open Redirect in Hoppscotch
CVE-2026-34847
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.
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (37.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Hoppscotch — versions < 2026.3.0
Weakness classification (CWE)
References
- github.com/hoppscotch/hoppscotch/security/advisories/GHSA-27pm-c9ch-746q (Exploit, Vendor Advisory)
- github.com/hoppscotch/hoppscotch/releases/tag/2026.3.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-34847?
- CVE-2026-34847 is a medium-severity vulnerability in Hoppscotch, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.7/10. Published 2026-04-02.
- How severe is CVE-2026-34847?
- Medium severity. CVSS v3 base score is 4.7 out of 10.