Is CVE-2026-7891 in the CISA KEV catalog?

No. CVE-2026-7891 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-7891?

CVE-2026-7891 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2026-7891?

CVE-2026-7891 has an EPSS score of 0.27% (19th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2026-7891?

No published fix for CVE-2026-7891 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2026-7891

CRITICAL

9.1

CVSS v3

NVD

Description

A vulnerability has been identified in Mendix Runtime (All versions). Mendix documentation for access rules does not adequately describe the special behavior of the System.User entity, leaving developers without sufficient guidance to configure access rules securely. This documentation gap may lead application developers to unknowingly apply overly permissive access rules to System.User, resulting in unintended exposure of sensitive user data or privilege escalation within deployed Mendix applications.

CWE-277

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.27%probability of exploitation in 30 days

19thpercentile

Low risk: more likely to be exploited than 19% of all known CVEs.

References

Other references3

Related Vulnerabilities

Other CWE-277 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-27842	High	8.8	2.4%	-	-
CVE-2024-39877	High	8.8	1.7%	-	Fix
CVE-2021-41170	Critical	9.8	1.5%	-	Fix
CVE-2024-27822	High	7.8	1.3%	-	Fix
CVE-2024-36539	Critical	9.8	1.3%	-	-
CVE-2021-32725	Low	3.5	1.2%	-	Fix

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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 2026-07-14.