4.3

CVE-2026-110453: nixos nix Incorrect Authorization

CVSS: 4.3v3.1MediumDeferred
Published 14-10-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-110453 is a medium (CVSS 4.3) Incorrect Authorization vulnerability in nixos nix. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.4% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-10-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

Nix before 2.35.3, when unsandboxed on macOS or FreeBSD, incorrectly allows connections made by build users from daemon clients.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

14-10-202621-10-2026
EPSS score
0.13%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Nixos1 product
  • nix< 2.28.8 | ≥ 2.29.0, < 2.30.6 | ≥ 2.31.0, < 2.31.6 | ≥ 2.32.0, < 2.34.9 | ≥ 2.35.0, < 2.35.3

1 vendor · 1 product

References

1 links