CVE-2026-58043

Unauthorized file access via radix split node grants

Published Jul 30, 2026 · Updated Jul 30, 2026

Improper access control in Node.js 22.23.1, 24.18.0, and 26.5.0 allows local users to read or write files outside an allowlist. The Permission Model grants a radix split node while matching an allowed path, causing sibling prefixes outside the allowlist to inherit filesystem access. Reachability requires the permission flag, a filesystem grant, and code able to select a boundary-adjacent path; the result is unauthorized file disclosure or modification.

CVSS severity7.5
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Node.js 22.23.1, 24.18.0, and 26.5.0 allows local users to read or write files outside an allowlist. The Permission Model grants a radix split node while matching an allowed path, causing sibling prefixes outside the allowlist to inherit filesystem access. Reachability requires the permission flag, a filesystem grant, and code able to select a boundary-adjacent path; the result is unauthorized file disclosure or modification.

The record

CVE
CVE-2026-58043
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
Node.js
Product
Node.js
Classifications
CWE-284, T1565.001, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=22.23.1 <=22.23.1
  2. Affected versionversion=24.18.0 <=24.18.0
  3. Affected versionversion=26.5.0 <=26.5.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Node.js · Node.jsversion=22.23.1 <=22.23.1; version=24.18.0 <=24.18.0; version=26.5.0 <=26.5.0

Published CVSS scores

8.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
7.5HackerOneCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1565.001Stored Data Manipulation
T1005Data from Local System

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

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Your stack

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