Open Redirect in Hoppscotch
CVE-2026-34931
hoppscotch is an open source API development ecosystem. Prior to version 2026.3.0, there is an open redirect vulnerability that leads to token exfiltration. With these tokens, the attacker can sign in as the victim to takeover their account. This issue has been patched in version 2026.3.0.
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.0% 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: 0.004 · change: +0.001
Affected products
- Hoppscotch — versions < 2026.3.0
Weakness classification (CWE)
References
- github.com/hoppscotch/hoppscotch/security/advisories/GHSA-7fg7-wx5q-6m3v (Exploit, Vendor Advisory)
- github.com/hoppscotch/hoppscotch/releases/tag/2026.3.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-34931?
- CVE-2026-34931 is a critical-severity vulnerability in Hoppscotch, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 9.6/10. Published 2026-04-02.
- How severe is CVE-2026-34931?
- Critical severity. CVSS v3 base score is 9.6 out of 10.