How severe is CVE-2026-4320?

CVE-2026-4320 has a CVSS 4.0 base score of 9.3, rated critical severity.

Is CVE-2026-4320 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-4320?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-4320 have an EU (EUVD) identifier?

Yes. CVE-2026-4320 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30762.

When was CVE-2026-4320 published?

CVE-2026-4320 was published on 2026-05-18 and last updated on 2026-06-17.

CVE-2026-4320

CVE-2026-4320 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. 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-288.

Key facts

Severity: Critical (CVSS 4.0 base score 9.3)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30762
Weakness: CWE-288
Published: 2026-05-18
Last modified: 2026-06-17

Description

Authorization Bypass vulnerability in Creartia's ICMS software could allow an attacker to gain unauthorized access to protected features by manipulating the HTTP redirect headers of the login process, causing the script to continue running and enabling privilege escalation without the need for credentials.

Frequently asked questions

What is CVE-2026-4320?: Authorization Bypass vulnerability in Creartia's ICMS software could allow an attacker to gain unauthorized access to protected features by manipulating the HTTP redirect headers of the login process, causing the script to continue running and enabling privilege escalation without the need for credentials.
How severe is CVE-2026-4320?: CVE-2026-4320 has a CVSS 4.0 base score of 9.3, rated critical severity.
Is CVE-2026-4320 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-4320?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-4320 have an EU (EUVD) identifier?: Yes. CVE-2026-4320 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30762.
When was CVE-2026-4320 published?: CVE-2026-4320 was published on 2026-05-18 and last updated on 2026-06-17.

References

https://www.incibe.es/en/incibe-cert/notices/aviso/authorization-bypass-icms-content-management-creartia-internet-consulting

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