CVE-2026-110451 Security feature bypass in Nix
Attackers can escape the Seatbelt sandbox on macOS due to a mishandled size threshold, bypassing security restrictions in Nix and Lix.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-110451?
CVE-2026-110451 is a medium-severity vulnerability in NixOS Nix, published on 14 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Nix before 2.35.3 and Lix before 2.95.4 on macOS allow a Seatbelt sandbox escape (for an unconfined build) because a certain size threshold is mishandled.
Weakness: CWE-863
Which versions are affected by CVE-2026-110451?
How do I fix CVE-2026-110451?
No fix has been published for CVE-2026-110451 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-110451 being exploited?
There is no known exploitation of CVE-2026-110451 in the wild and no public exploit code.
Sources
Also known as GHSA-5h53-jg3j-22gg, UBUNTU-CVE-2026-110451.