by Kastro
Paper/Archive/CVE-2026-34932

CVE-2026-34932

hoppscotch hoppscotch — hoppscotch: Stored XSS via mock server responses on backend origin

EPSS 0.3%CVSS 9.3
critical.is priorityof 100
32
CVSS 9.3 (NVD)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 21.9.220 × 204.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
hoppscotch< 2026.3.0–CNA

Scores by source

NVD9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
GitHub_M (CNA)8.5CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/hoppscotch/hoppscotch/security/advisories/GHSA-wj4r-hr4h-g98vrefgithub.com/hoppscotch/hoppscotch/releases/tag/2026.3.0