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TI-2026-17428 Aliases CVE-2026-21636GHSA-7xhv-hcmf-4rfv

Improper access control in NodeJS node

Priority MEDIUM 50CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-284.

Summary

A flaw in Node.js's permission model allows Unix Domain Socket (UDS) connections to bypass network restrictions when `--permission` is enabled. Even without `--allow-net`, attacker-controlled inputs (such as URLs or socketPath options) can connect to arbitrary local sockets via net, tls, or undici/fetch. This breaks the intended security boundary of the permission model and enables access to privileged local services, potentially leading to privilege escalation, data exposure, or local code execution. * The issue affects users of the Node.js permission model on version v25. In the moment of this vulnerability, network permissions (`--allow-net`) are still in the experimental phase.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0087 59th percentileScored 2026-11-07
Fix Fixed Red Hat: 4 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
NodeJSnode25.2.1 – 25.2.1—No fix listedCNA
  • node VendorNodeJS Affected 25.2.1 – 25.2.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*25.0.0 to before 25.3.0VulnerableNodeJS
  • cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* Versions 25.0.0 to before 25.3.0 Vulnerable ·NodeJS

Remediation

Red Hat 4 advisories

  • RHSA-2026:7387 Released 2026-04-10 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images nodejs22-22.22.0-1.3.hum1@aarch64, nodejs22-22.22.0-1.3.hum1@src, nodejs22-22.22.0-1.3.hum1@x86_64 +14
  • RHSA-2026:7386 Released 2026-04-10 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images nodejs20-20.20.0-7.1.hum1@aarch64, nodejs20-20.20.0-7.1.hum1@src, nodejs20-20.20.0-7.1.hum1@x86_64 +14
  • RHSA-2026:6431 Released 2026-04-02 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images nodejs25-25.9.0-1.hum1@aarch64, nodejs25-25.9.0-1.hum1@src, nodejs25-25.9.0-1.hum1@x86_64 +14
Show 1 more Red Hat advisories
  • RHSA-2026:6402 Released 2026-04-01 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images nodejs24-24.14.1-4.hum1@aarch64, nodejs24-24.14.1-4.hum1@src, nodejs24-24.14.1-4.hum1@x86_64 +14

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Hardened ImagesFixed RHSA-2026:6402, RHSA-2026:6431, RHSA-2026:7386, RHSA-2026:7387
Not affected: 4 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-21636
  2. 2026-10-03 Alias added: GHSA-7xhv-hcmf-4rfv
  3. 2026-10-16 Affected versions changed · Red Hat

References

Advisory 1

  • TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2016-01993 The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other… CVSS 3.1HIGH 7.5
  • TI-2024-03325 Command injection vulnerability in programing languages on Microsoft Windows operating system. CVSS 3.1CRITICAL 9.8
  • TI-2022-03472 X.509 Email Address Variable Length Buffer Overflow CVSS 3.1HIGH 7.5
  • TI-2022-03315 X.509 Email Address 4-byte Buffer Overflow CVSS 3.1HIGH 7.5
See all 186 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences