Is CVE-2026-8432 in the CISA KEV catalog?

No. CVE-2026-8432 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-8432?

CVE-2026-8432 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2026-8432?

CVE-2026-8432 has an EPSS score of 0.13% (3th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-8432?

Upgrade concrete cms to 9.5.1 or later.

CVE & CISA-KEV Catalog

CVE-2026-8432

HIGH

8.8

CVSS v3

NVD

Description

Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file star(). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.

CWE-352Cross-Site Request Forgery CWE-1275

How to fix

Remediation Available

concrete cmsNVD

Affected:>= 9.0.0, < 9.5.1Fixed in:9.5.1CVE-2026-8432derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

0.13%probability of exploitation in 30 days

3rdpercentile

Low risk: more likely to be exploited than 3% of all known CVEs.

References

Release Notes1

documentation.concretecms.org

Embed a live status badge for CVE-2026-8432

Markdown

[![CVE-2026-8432](https://tridentstack.com/cve/badge/CVE-2026-8432.svg)](https://tridentstack.com/cve/CVE-2026-8432)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-8432"><img src="https://tridentstack.com/cve/badge/CVE-2026-8432.svg" alt="CVE-2026-8432"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-26.