HOMEVULNERABILITIESCVE-2026-21715
LOW

CVE-2026-21715

Published: March 30, 2026· Updated: Apr 1, 2026

3.3
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:0.3th

Official Description

A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync.native()` without the required read permission checks, while all comparable filesystem functions correctly enforce them.

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

This vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-read` is intentionally restricted.

NVD Source

Technical Analysis

CVE-2026-21715 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

Mentioned vendors (from description):
Node.js
CPE data not yet available in NVD for this CVE.

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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All References (1)

→
https://nodejs.org/en/blog/vulnerability/march-2026-security-releases

Quick Facts

CVE IDCVE-2026-21715
CVSS Score3.3 / 10
SeverityLOW
CISA KEVNo
EPSS (30d)0.01%
PublishedMar 30, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-21715 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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