Bug 2560021 (CVE-2026-106073) - CVE-2026-106073 nodejs: Node.js: Filesystem read permission bypass via fs.realpathSync()
Summary: CVE-2026-106073 nodejs: Node.js: Filesystem read permission bypass via fs.rea...
Keywords:
Status: NEW
Alias: CVE-2026-106073
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2560635 2560636 2560637 2560638 2560639 2560640 2560641
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-23 16:22 UTC by OSIDB Bzimport
Modified: 2026-10-29 22:29 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:92376 0 None None None 2026-10-29 14:21:12 UTC
Red Hat Product Errata RHSA-2026:92378 0 None None None 2026-10-29 22:29:49 UTC

Description OSIDB Bzimport 2026-10-23 16:22:57 UTC 
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**.
Comment 2 Jon Orris 2026-10-29 14:21:11 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:92376 https://access.redhat.com/errata/RHSA-2026:92376
Comment 3 Jon Orris 2026-10-29 22:29:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:92378 https://access.redhat.com/errata/RHSA-2026:92378
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