# CVE-2026-106073: CVE-2026-106073

Status: published. Published: 2026-10-23. Updated: 2026-11-02.

A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync()` without the required read permission checks. This is an incomplete fix of CVE-2026-21715, which only covered `fs.realpathSync.native()`.

As a result, code running under `--permission` with restricted `--allow-fs-read` can still use `fs.realpathSync()` to check file existence, resolve symlink targets, and enumerate filesystem paths outside of permitted directories.

This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- nodejs / node: ≥ 22.23.3; ≤ 22.23.3 (affected, semver); ≥ 24.22.0; ≤ 24.22.0 (affected, semver); ≥ 26.12.0; ≤ 26.12.0 (affected, semver). Source: CNA: hackerone

## Severity and prioritization

- CVSS 3.0: 3.3 (low); CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N; source: CNA: hackerone

- CVSS 3.0: 3.3 (low); CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N; source: NVD: support@hackerone.com

- CISA KEV: No listing in collected sources

- EPSS: 0.25% as of 2026-11-02; percentile 16.91%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-284

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://nodejs.org/en/blog/vulnerability/october-2026-security-releases (CNA: hackerone)

- https://nodejs.org/en/blog/vulnerability/october-2026-security-releases (support@hackerone.com)

## Provenance

- CNA: hackerone: https://www.cve.org/CVERecord?id=CVE-2026-106073; retrieved 2026-11-02; source updated 2026-11-02

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-106073; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-106073; retrieved 2026-11-02; source updated Not reported

Revision: 2e2d733570791eb2e539de059b9d9c1158db9facdcd6db70084db34adcc2d29f

Canonical: https://y2.dev/cve/CVE-2026-106073

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