---
title: "CVE-2026-40960\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-40960?format=md
keywords: index, follow
---

# CVE-2026-40960

Publication date 16 April 2026

Last updated 6 June 2026

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**8.1 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2026-40960?format=md#impact-score)

Toggle side navigation

## 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.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| luanti | 26.04 LTS resolute | Fixed 5.10.0+dfsg-5+deb13u1build0.26.04.1 |
| 25.10 questing | Fixed 5.10.0+dfsg-5+deb13u1build0.25.10.1 |
| 24.04 LTS noble | Not in release |
| 22.04 LTS jammy | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

8.1 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | High |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Changed |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 8.1 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-40960)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-40960)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-40960)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-40960)

### Related Ubuntu Security Notices (USN)

+ [USN-8366-1](https://usn.ubuntu.com/USN-8366-1)
+ Luanti vulnerabilities
+ 2 June 2026

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-40960>
* <https://github.com/luanti-org/luanti/security/advisories/GHSA-22c4-238c-m5j4>
* <https://github.com/luanti-org/luanti/commit/0faf529bc4b89e70a275ed1162047815118f2413 (master)>
* <https://github.com/luanti-org/luanti/commit/827fd4cf7f989482b2dad381fa4afd642ea73e8c (5.15.2)>