CVE-2026-34932CWE-79

hoppscotch: Stored XSS via mock server responses on backend origin

High · published April 2, 2026

CVSS v4.0
8.5
EPSS
0%
Percentile
33.0
In the wild
Unconfirmed
What it is

hoppscotch is an open source API development ecosystem. Prior to version 2026.3.0, there is a stored XSS vulnerability that can lead to CSRF. This issue has been patched in version 2026.3.0.

The record
Technical detail
CVSS v4.0
8.5 · HIGH
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
EPSS
0.00399 · 33.0th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-04-02T19:19Z
EPSS history
Timeline
  • 02 APR 19:19Z
    hoppscotch: Stored XSS via mock server responses on backend origin
    cvelistv5