NixOS Lix/Nix up to 2.35.2 Repair Operation privileges management

Summaryinfo

A vulnerability marked as very critical has been reported in NixOS Lix and Nix up to 2.28.7/2.30.5/2.31.5/2.34.8/2.35.2. Affected by this vulnerability is an unknown functionality of the component Repair Operation. The manipulation leads to privileges management. This vulnerability is referenced as CVE-2026-110450. The attack can only be performed from a local environment. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in NixOS Lix and Nix up to 2.28.7/2.30.5/2.31.5/2.34.8/2.35.2 and classified as very critical. This issue affects an unknown code of the component Repair Operation. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Nix before 2.35.3 and Lix before 2.95.4 allow privilege escalation via a repair operation because it could destroy and then replace a store path before content verification.

The advisory is shared at discourse.nixos.org. The identification of this vulnerability is CVE-2026-110450 since 10/14/2026. The exploitation is known to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/14/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 2.28.8, 2.30.6, 2.31.6, 2.34.9 or 2.35.3 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• NixOS

Name

• Lix
• Nix

Version

• 2.28.0
• 2.28.1
• 2.28.2
• 2.28.3
• 2.28.4
• 2.28.5
• 2.28.6
• 2.28.7
• 2.30.0
• 2.30.1
• 2.30.2
• 2.30.3
• 2.30.4
• 2.30.5
• 2.31.0
• 2.31.1
• 2.31.2
• 2.31.3
• 2.31.4
• 2.31.5
• 2.34.0
• 2.34.1
• 2.34.2
• 2.34.3
• 2.34.4
• 2.34.5
• 2.34.6
• 2.34.7
• 2.34.8
• 2.35.0
• 2.35.1
• 2.35.2

CPE 2.3info

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CPE 2.2info

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Entryinfo

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