Is CVE-2026-40960 in the CISA KEV catalog?

No. CVE-2026-40960 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-40960?

CVE-2026-40960 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2026-40960?

CVE-2026-40960 has an EPSS score of 0.17% (7th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-40960?

Upgrade luanti on debian 13 to 5.10.0+dfsg-5+deb13u1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2026-40960

HIGH

8.1

CVSS v3

NVD

Description

Luanti 5 before 5.15.2 sometimes allows unintended access to an insecure environment. If at least one mod is listed as secure.trusted_mods or secure.http_mods, then a crafted mod can intercept the request for the insecure environment or HTTP API, and also receive access to it.

CWE-670

How to fix

Remediation Available

luantiDebian

Fixed in:5.10.0+dfsg-5+deb13u1CVE-2026-40960

Fixed in:5.15.2+dfsg-1CVE-2026-40960

luantiUbuntu

Fixed in:5.10.0+dfsg-5+deb13u1build0.25.10.1USN-8366-1

luanti-dataUbuntu

Fixed in:5.10.0+dfsg-5+deb13u1build0.25.10.1USN-8366-1

luanti-serverUbuntu

Fixed in:5.10.0+dfsg-5+deb13u1build0.25.10.1USN-8366-1

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 VectorLocal

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.17%probability of exploitation in 30 days

7thpercentile

Low risk: more likely to be exploited than 7% of all known CVEs.

References

Other references3

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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 2026-04-17.