What is CVE-2026-34848?

CVE-2026-34848 is a medium-severity vulnerability in Hoppscotch, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-02.

How severe is CVE-2026-34848?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Hoppscotch

CVE-2026-34848

hoppscotch is an open source API development ecosystem. Prior to version 2026.3.0, there is a stored XSS vulnerability in the team member overflow tooltip via display name. This issue has been patched in version 2026.3.0.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-04-02 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (13.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001

Affected products

Hoppscotch — versions < 2026.3.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/hoppscotch/hoppscotch/security/advisories/GHSA-vw93-4m6p-ccm9 (Vendor Advisory)
github.com/hoppscotch/hoppscotch/releases/tag/2026.3.0 (Release Notes)

Frequently asked questions

What is CVE-2026-34848?: CVE-2026-34848 is a medium-severity vulnerability in Hoppscotch, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-02.
How severe is CVE-2026-34848?: Medium severity. CVSS v3 base score is 5.4 out of 10.