Bug 2552072 (CVE-2026-110452)

Summary: CVE-2026-110452 nix: nix: Unauthorized file modification via improper multi-user installer ownership
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in nix. The multi-user installer incorrectly assigns ownership of Nix store contents to the user who ran the installation rather than to root. A local user who executed the installer can modify files within the Nix store, leading to unauthorized modification of installed software components.
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Description OSIDB Bzimport 2026-10-14 04:33:58 UTC
The multi-user installer in Nix before 2.35.3 sets the ownership of store contents to the user (who invoked the installer) even though it should be root ownership.