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.

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 wit…

Vulnerability class: Open Redirect

EPSS: 0.004 (59.9th percentile) — read the EPSS interpretation.

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.

Affected products

Hoppscotch — versions < 2026.3.0

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

https://github.com/hoppscotch/hoppscotch/security/advisories/GHSA-27pm-c9ch-746q (x_refsource_CONFIRM)
https://github.com/hoppscotch/hoppscotch/releases/tag/2026.3.0 (x_refsource_MISC)

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.