CVE-2026-22674
CVE-2026-22674 is a medium-severity vulnerability with a CVSS 3.x base score of 4.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.
Key facts
- Severity: Medium (CVSS 3.x base score 4.8)
- CVSS v4: 4.8
- EPSS exploit prediction: 0% (7th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-37952
- Weakness: CWE-79
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-22674?
- 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.
- How severe is CVE-2026-22674?
- CVE-2026-22674 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2026-22674 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-22674?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-22674 have an EU (EUVD) identifier?
- Yes. CVE-2026-22674 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37952.
- When was CVE-2026-22674 published?
- CVE-2026-22674 was published on 2026-06-18 and last updated on 2026-06-23.
References
- https://github.com/hashgraph/guardian/commit/ba8c566807848cf84360716438056d8d8d2c8362
- https://github.com/hashgraph/guardian/pull/6190
- https://www.vulncheck.com/advisories/hashgraph-guardian-stored-xss-via-branding-companyname-field
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