High severity · published Oct 14, 2026
CVE-2026-110449
Nix before 2.35.3 and Lix before 2.95.4 have an integer overflow and resultant out-of-bounds write when evaluating untrusted expressions because list allocation is mishandled
7.5
CVSS
0.2%
EPSS
No
On KEV
Description
Nix before 2.35.3 and Lix before 2.95.4 have an integer overflow and resultant out-of-bounds write when evaluating untrusted expressions because list allocation is mishandled.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NI
Nix · NixOS
before 2.28.8; 2.29.0 before 2.30.6; 2.31.0 before 2.31.6; 2.32.0 before 2.34.9; 2.35.0 before 2.35.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-110449
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-110449
discourse.nixos.org
https://discourse.nixos.org/t/security-advisory-for-nix-and-lix-october-2026/80547
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