hoppscotch: Stored XSS in team member overflow tooltip via display name

published 2026-04-02 7 mo ago modified 2026-07-24 3 mo ago also EUVD-2026-18536

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits: 0; none known

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.

Patch / fix

fixed in 1 links 1

hoppscotch hoppscotch 2026.3.0

github.com/hoppscotch/hoppscotch/releases/tag/2026.3.0 release

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 7 mo ago (2026-04-03)

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

hoppscotch hoppscotch

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /hoppscotch/hoppscotch/security/advisories/GHSA-vw93-4m6p-ccm9
vendor-advisory
github.com /hoppscotch/hoppscotch/releases/tag/2026.3.0
release-notes

Sources

CVE List CVE-2026-34848
NVD CVE-2026-34848

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary