CVE-2026-110451

Published Oct 14, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

NixOS

Nix

unaffected

Version	Status	Constraints
`0`	affected	< 2.28.8
`2.29.0`	affected	< 2.30.6
`2.31.0`	affected	< 2.31.6
`2.32.0`	affected	< 2.34.9
`2.35.0`	affected	< 2.35.3

No data.

Vendor Product Versions

Nixos

Nix

Version	Status	Scheme	Platform
`[0,2.28.8)`	affected	generic	—
`[2.29.0,2.30.6)`	affected	semver	—
`[2.31.0,2.31.6)`	affected	semver	—
`[2.32.0,2.34.9)`	affected	semver	—
`[2.35.0,2.35.3)`	affected	semver	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.131% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

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

History

Oct 15, 2026 1:30 PM Title updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Title	Seatbelt Sandbox Escape via Mishandled Size Threshold on macOS
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Oct 14, 2026 5:00 PM Title updated View changes

Type	Values Removed	Values Added
Title		Seatbelt Sandbox Escape via Mishandled Size Threshold on macOS

Oct 14, 2026 4:30 AM Description updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
First Time appeared		Nixos Nixos nix
Weaknesses		CWE-863
CPEs		cpe:2.3:a:nixos:nix::::::::
Vendors & Products		Nixos Nixos nix
References		https://discourse.nixos.org/t/security-advisory-for-nix-and-lix-october-2026/80547
Metrics		cvssV3_1 `{'score': 4.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N'}`