Vulnerability · Published Apr 16, 2026 · Assigned by mitre
CVE-2026-40959
Critical 9.3
In plain English
A critical-severity security flaw in Luanti from Luanti. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.3Critical
Exploit odds (30 days)0.2%top 92.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Luanti 5 before 5.15.2, when LuaJIT is used, allows a Lua sandbox escape via a crafted mod.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | luanti | 5.10.0+dfsg-5+deb13u1 | DEBIAN-CVE-2026-40959 |
| Debian:14 | luanti | 5.15.2+dfsg-1 | DEBIAN-CVE-2026-40959 |
| Ubuntu:25.10 | luanti | 5.10.0+dfsg-5+deb13u1build0.25.10.1 | USN-8366-1 |
| Ubuntu:25.10 | luanti | 5.10.0+dfsg-5+deb13u1build0.25.10.1 | UBUNTU-CVE-2026-40959 |
| Ubuntu:26.04:LTS | luanti | 5.10.0+dfsg-5+deb13u1build0.26.04.1 | USN-8366-1 |
| Ubuntu:26.04:LTS | luanti | 5.10.0+dfsg-5+deb13u1build0.26.04.1 | UBUNTU-CVE-2026-40959 |
Affected products (as reported)
Weakness: CWE-829 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H