Local filesystem path disclosure via unchecked realpath
Published Mar 30, 2026 · Updated Mar 30, 2026
Information disclosure in Node.js 20.x, 22.x, 24.x, and 25.x allows local users to enumerate restricted filesystem paths. fs.realpathSync.native() omits the Permission Model read check and resolves symlink targets or reports path existence outside the allowlist. The bypass requires a process started with --permission and a deliberately restricted --allow-fs-read policy; it exposes path metadata but not file contents.
Summary
What happened
Information disclosure in Node.js 20.x, 22.x, 24.x, and 25.x allows local users to enumerate restricted filesystem paths. fs.realpathSync.native() omits the Permission Model read check and resolves symlink targets or reports path existence outside the allowlist. The bypass requires a process started with --permission and a deliberately restricted --allow-fs-read policy; it exposes path metadata but not file contents.
The record
- CVE
- CVE-2026-21715
- Published
- Mar 30, 2026
- Updated
- Mar 30, 2026
- Vendor
- Node.js
- Product
- Node.js
- Classifications
- CWE-732, T1083
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 30, 2026CVE publishedPublication date reported by the CVE source.
- Mar 30, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0 <10.*
- Affected versionversion=11.0 <11.*
- Affected versionversion=12.0 <12.*
- Affected versionversion=13.0 <13.*
- Affected versionversion=14.0 <14.*
- Affected versionversion=15.0 <15.*
- Affected versionversion=16.0 <16.*
- Affected versionversion=17.0 <17.*
- Affected versionversion=18.0 <18.*
- Affected versionversion=19.0 <19.*
- Affected versionversion=20.20.1 <=20.20.1
- Affected versionversion=22.22.1 <=22.22.1
- Affected versionversion=24.14.0 <=24.14.0
- Affected versionversion=25.8.1 <=25.8.1
- Affected versionversion=4.0 <4.*
- Affected versionversion=5.0 <5.*
- Affected versionversion=6.0 <6.*
- Affected versionversion=7.0 <7.*
- Affected versionversion=8.0 <8.*
- Affected versionversion=9.0 <9.*
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo