CVE-2026-22674 Hashgraph Guardian Stored XSS via branding companyName field
Authenticated users can inject malicious scripts via the branding companyName field, leading to arbitrary JavaScript execution in other users' browsers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-22674?
CVE-2026-22674 is a medium-severity cross-site scripting vulnerability in hashgraph guardian, published on 18 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Hashgraph Guardian through 3.6.0, fixed in commit ba8c566, contains a stored cross-site scripting vulnerability that allows authenticated users with the STANDARD_REGISTRY role to inject malicious scripts by submitting a crafted companyName value via the branding configuration API endpoint. Attackers can exploit the unsanitized innerHTML assignment in the branding service to execute arbitrary JavaScript in the browser of every authenticated user on every page load.
Weakness: CWE-79
Which versions are affected by CVE-2026-22674?
How do I fix CVE-2026-22674?
No fix has been published for CVE-2026-22674 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-2026-22674 being exploited?
There is no known exploitation of CVE-2026-22674 in the wild and no public exploit code.
Sources
Also known as GHSA-jqx7-93j3-2xqf.