---
id: CVE-2026-22674
title: Hashgraph Guardian Stored XSS via branding companyName field
summary: >-
  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
  companyNa…
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: hashgraph
product: guardian
affected:
  - guardian <= 3.6.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-22T14:42:27.377592Z'
published: '2026-06-18'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:01:17.156Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-22674'
references:
  - url: 'https://github.com/hashgraph/guardian/pull/6190'
  - url: >-
      https://github.com/hashgraph/guardian/commit/ba8c566807848cf84360716438056d8d8d2c8362
  - url: >-
      https://www.vulncheck.com/advisories/hashgraph-guardian-stored-xss-via-branding-companyname-field
tags:
  - cve.org
epss: 0.00309
epssPercentile: 0.23921
ingestedAt: '2026-11-08T14:51:22.475Z'
---

## Overview

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.

## Affected

- `guardian <= 3.6.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.