What is CVE-2026-110449?

CVE-2026-110449 is a high-severity vulnerability in Nixos Nix, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-10-14.

How severe is CVE-2026-110449?

High severity. CVSS v3 base score is 7.5 out of 10.

Integer overflow in Nixos Nix

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.

Vulnerability class: Integer Overflow

Published 2026-10-14 · last modified 2026-10-14.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Nixos Nix

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

discourse.nixos.org/t/security-advisory-for-nix-and-lix-october-2026/80547

Frequently asked questions

What is CVE-2026-110449?: CVE-2026-110449 is a high-severity vulnerability in Nixos Nix, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2026-10-14.
How severe is CVE-2026-110449?: High severity. CVSS v3 base score is 7.5 out of 10.