CVE-2026-34931 HIGH

CVE-2026-34931: hoppscotch: Improper loopback redirect_uri validation in device-login flow

Vendor Hoppscotch
Product hoppscotch
Weakness CWE-601 · Open redirect
Published April 2, 2026
Last update April 6, 2026
View on NVD All CVEs

CVSS base score

8.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 2, 2026 CVE published
April 6, 2026 Record updated