CVE-2026-34848 hoppscotch: Stored XSS in team member overflow tooltip via display name
Attackers can inject malicious scripts via team member display names, potentially compromising user sessions in the Hoppscotch API development platform.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-34848?
CVE-2026-34848 is a medium-severity cross-site scripting vulnerability in hoppscotch, published on 2 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-34848?
It affects 1 product.
Products include Hoppscotch Hoppscotch.
How do I fix CVE-2026-34848?
No fix has been published for CVE-2026-34848 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-34848 being exploited?
There is no known exploitation of CVE-2026-34848 in the wild and no public exploit code.
Other vulnerabilities in hoppscotch
- CVE-2026-50160 Mass Assignment via Onboarding Endpoint Allows Unauthenticated JWT_SECRET Overwrite
- CVE-2026-28215 hoppscotch Vulnerable to Unauthenticated Onboarding Config Takeover
- CVE-2026-34931 hoppscotch: Improper loopback redirect_uri validation in device-login flow
- CVE-2026-34932 hoppscotch: Stored XSS via mock server responses on backend origin
- CVE-2026-28216 hoppscotch has IDOR in updateUserEnvironment / deleteUserEnvironment
Sources
Also known as GHSA-vw93-4m6p-ccm9.