Vulnerability · Published Apr 2, 2026 · Assigned by GitHub_M
CVE-2026-34932hoppscotch: Stored XSS via mock server responses on backend origin
High 8.5
In plain English
A high-severity cross-site scripting in hoppscotch from hoppscotch. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).
Severity (CVSS 4.0)8.5High
Exploit odds (30 days)0.3%top 78.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| hoppscotch | hoppscotch | < 2026.3.0 |
Weakness: CWE-79 · 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
References
- https://github.com/hoppscotch/hoppscotch/security/advisories/GHSA-wj4r-hr4h-g98v x_refsource_CONFIRM
- https://github.com/hoppscotch/hoppscotch/releases/tag/2026.3.0 x_refsource_MISC