CVE-2026-22674

Hashgraph Guardian Stored XSS via branding companyName field

State: Published
Severity: 4.8 Medium
Published: Jun 18, 2026
Updated: Jul 14, 2026
Reserved: Jan 8, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	4.8 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N	VulnCheck
3.1	4.8 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N	VulnCheck

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
guardianhashgraph	3.6.0 and earlierAffected ba8c566807848cf84360716438056d8d8d2c8362Not affected

References

https://github.com/hashgraph/guardian/pull/6190issue-tracking
https://github.com/hashgraph/guardian/commit/ba8c566807848cf84360716438056d8d8d2c8362patch
https://www.vulncheck.com/advisories/hashgraph-guardian-stored-xss-via-branding-companyname-fieldthird-party-advisory

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