CVE-2026-106073 (GCVE-0-2026-106073)

Vulnerability from cvelistv5 – Published: 2026-10-23 16:15 – Updated: 2026-10-23 16:15
VLAI
Summary
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**.
Severity
3.3 (Low)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-284 - Improper Access Control - Generic
Assigner
hackerone CNA under the mitre root
CNA scorecard D 59/100 over 195 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
nodejs node Affected: 22.23.3 , ≤ 22.23.3 (semver)
Affected: 24.22.0 , ≤ 24.22.0 (semver)
Affected: 26.12.0 , ≤ 26.12.0 (semver)
guessed Create a notification for this product.
Show details on NVD website
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    "dateReserved": "2026-10-06T15:00:00.655Z",
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    "microsoft_vex": {
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      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "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()`.\n\nAs 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.\n\nThis vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-106073.json",
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          }
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}



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