CVE-2026-110450: CWE-696 Incorrect Behavior Order in NixOS Nix
Description
CVE-2026-110450 is a high-severity vulnerability in NixOS Nix affecting multiple versions before 2.35.3. It involves an incorrect behavior order during a repair operation that can lead to privilege escalation by destroying and replacing a store path before verifying its content.
CVSS v3.1
Score 8.0high
Affected software
NixOS
Nix
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-110450) affects Nix versions prior to 2.35.3, including several specific version ranges. The flaw arises from an incorrect sequence in the repair operation process, where a store path may be destroyed and replaced before the content is verified. This improper ordering can be exploited to escalate privileges on the affected system. The CVSS 3.1 score is 8.0, indicating high severity, with attack vector local, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and low impact on availability.
Potential Impact
Successful exploitation allows an attacker with local access to escalate privileges by manipulating the repair operation to replace store paths without proper content verification. This can lead to full compromise of the affected system's confidentiality and integrity.
Mitigation Recommendations
Users should upgrade to Nix version 2.35.3 or later, where this vulnerability is fixed. Versions affected are explicitly listed and should be considered vulnerable. No information about alternative mitigations or temporary fixes is provided, so applying the official patch is the recommended action.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-10-14T04:03:11.878Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6acf06312cdf04f6563e800c
Added to database: 10/14/2026, 04:33:53 UTC
Last enriched: 10/14/2026, 04:48:15 UTC
Last updated: 10/14/2026, 04:48:58 UTC
Views: 4
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