CVE-2026-34931: Hoppscotch

Critical severity, CVSS 9.6. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Hoppscotch Hoppscotch: before 2026.3.0 (fixed in 2026.3.0)

Published 2026-04-02. Last modified 2026-07-24.