Medium severity · published Jun 18, 2026
CVE-2026-22674
Hashgraph Guardian Stored XSS via branding companyName field
4.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 24% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GU
guardian · hashgraph
through 3.6.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-22674
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-22674
github.com
https://github.com/hashgraph/guardian/commit/ba8c566807848cf84360716438056d8d8d2c8362
github.com
https://github.com/hashgraph/guardian/pull/6190
www.vulncheck.com
https://www.vulncheck.com/advisories/hashgraph-guardian-stored-xss-via-branding-companyname-field
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