# CVE-2026-34848: Hoppscotch stored XSS in team member overflow tooltip

Source: https://junglewise.ai/threats/cve-2026-34848-hoppscotch-stored-xss-in-team-member-overflow-tooltip  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-02. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-34848 · Severity: medium · CVSS 5.4 · Published 2026-04-02

Hoppscotch, an open-source API development platform, contains a security flaw in how it displays team member names in shared workspaces. An authenticated user could set a malicious display name that executes code in the browsers of other team members when they hover over or click on the member list. This could allow an attacker to perform unauthorized actions on behalf of other users or interfere with the workspace.

Technologies: [Hoppscotch](https://junglewise.ai/threats/technologies/hoppscotch). Vendors: [Hoppscotch](https://junglewise.ai/threats/vendors/hoppscotch).

## Quick answers

**Is CVE-2026-34848 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34848 being exploited in the wild.

**How severe is CVE-2026-34848?** Medium severity, with a CVSS score of 5.4, published 2 April 2026.

**Which products and versions are affected?** Hoppscotch < 2026.3.0.

**Is there a fix for CVE-2026-34848?** A patch was published on 2026-03-31: Version 2026.3.0 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-34848 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-34848?** Check whether you run Hoppscotch at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A stored cross-site scripting (XSS) vulnerability exists in Hoppscotch's MemberStack.vue component. The root cause is the insecure use of tippy.js with the 'allowHTML: true' configuration, which fails to neutralize user-controlled display names before rendering them in the team member overflow tooltip. An authenticated attacker with low privileges can set their display name to an HTML/JavaScript payload. When another user in a shared workspace with four or more members hovers over or clicks the member stack to view the overflow tooltip, the payload executes in their browser context. This allows for session hijacking or DOM manipulation within the scope of the shared workspace. The issue is fixed in version 2026.3.0 by treating display names as plain text.

## Affected products

- hoppscotch hoppscotch < 2026.3.0

## Timeline

- 2026-03-31: patched: Version 2026.3.0 released
- 2026-03-31: advisory: GitHub Security Advisory GHSA-vw93-4m6p-ccm9 published
- 2026-04-02: disclosed: CVE-2026-34848 published to NVD

## References

- [https://github.com/hoppscotch/hoppscotch/releases/tag/2026.3.0](https://github.com/hoppscotch/hoppscotch/releases/tag/2026.3.0)
- [https://github.com/hoppscotch/hoppscotch/security/advisories/GHSA-vw93-4m6p-ccm9](https://github.com/hoppscotch/hoppscotch/security/advisories/GHSA-vw93-4m6p-ccm9)

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