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TI-2026-17429 Aliases CVE-2026-21637GHSA-ggxc-26fx-987r

Uncontrolled resource consumption in NodeJS node

Priority MEDIUM 41CWE-400Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

A flaw in Node.js TLS error handling allows remote attackers to crash or exhaust resources of a TLS server when `pskCallback` or `ALPNCallback` are in use. Synchronous exceptions thrown during these callbacks bypass standard TLS error handling paths (tlsClientError and error), causing either immediate process termination or silent file descriptor leaks that eventually lead to denial of service. Because these callbacks process attacker-controlled input during the TLS handshake, a remote client can repeatedly trigger the issue. This vulnerability affects TLS servers using PSK or ALPN callbacks across Node.js versions where these callbacks throw without being safely wrapped.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01119 66th percentileScored 2026-11-07
Fix Fixed Red Hat: 19 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
NodeJSnode20.19.6 – 20.19.6; 22.21.1 – 22.21.1; 24.12.0 – 24.12.0; 25.2.1 – 25.2.1; 4.0 and later; 5.0 and later; 6.0 and later; 7.0 and later; 8.0 and later; 9.0 and later; 10.0 and later; 11.0 and later; 12.0 and later; 13.0 and later; 14.0 and later; 15.0 and later; 16.0 and later; 17.0 and later; 18.0 and later—No fix listedCNA
  • node VendorNodeJS Affected 20.19.6 – 20.19.6; 22.21.1 – 22.21.1; 24.12.0 – 24.12.0; 25.2.1 – 25.2.1; 4.0 and later; 5.0 and later; 6.0 and later; 7.0 and later; 8.0 and later; 9.0 and later; 10.0 and later; 11.0 and later; 12.0 and later; 13.0 and later; 14.0 and later; 15.0 and later; 16.0 and later; 17.0 and later; 18.0 and later Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*4.0.0 to before 20.20.0; 22.0.0 to before 22.22.0; 24.0.0 to before 24.13.0; 25.0.0 to before 25.3.0VulnerableNodeJS
  • cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* Versions 4.0.0 to before 20.20.0; 22.0.0 to before 22.22.0; 24.0.0 to before 24.13.0; 25.0.0 to before 25.3.0 Vulnerable ·NodeJS

Remediation

Red Hat 19 advisories

  • RHSA-2026:7670 Released 2026-04-13 · Red Hat rating Important
    nodejs:24 security update
    • Red Hat Enterprise Linux AppStream (v. 8) nodejs-1:24.14.1-2.module+el8.10.0+24190+49a46c75.aarch64::nodejs:24, nodejs-1:24.14.1-2.module+el8.10.0+24190+49a46c75.ppc64le::nodejs:24, nodejs-1:24.14.1-2.module+el8.10.0+24190+49a46c75.s390x::nodejs:24 +25
  • RHSA-2026:7675 Released 2026-04-13 · Red Hat rating Important
    nodejs24 security update
    • Red Hat Enterprise Linux AppStream (v. 10) nodejs24-1:24.14.1-2.el10_1, nodejs24-devel-1:24.14.1-2.el10_1, nodejs24-docs-1:24.14.1-2.el10_1 +3
  • 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
Show 16 more Red Hat advisories
  • 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-2026:7350 Released 2026-04-09 · Red Hat rating Important
    nodejs:24 security update
    • Red Hat Enterprise Linux AppStream (v. 9) nodejs-1:24.14.1-2.module+el9.7.0+24166+51c9666b.aarch64::nodejs:24, nodejs-1:24.14.1-2.module+el9.7.0+24166+51c9666b.ppc64le::nodejs:24, nodejs-1:24.14.1-2.module+el9.7.0+24166+51c9666b.s390x::nodejs:24 +25
  • 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
  • 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
  • RHSA-2026:2899 Released 2026-02-18 · Red Hat rating Important
    nodejs22 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) nodejs-1:22.22.0-1.el10_0, nodejs-devel-1:22.22.0-1.el10_0, nodejs-docs-1:22.22.0-1.el10_0 +4
  • RHSA-2026:2864 Released 2026-02-18 · Red Hat rating Important
    nodejs:22 security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) nodejs-1:22.22.0-1.module+el9.6.0+23985+21730e4b.aarch64::nodejs:22, nodejs-1:22.22.0-1.module+el9.6.0+23985+21730e4b.ppc64le::nodejs:22, nodejs-1:22.22.0-1.module+el9.6.0+23985+21730e4b.s390x::nodejs:22 +28
  • RHSA-2026:2782 Released 2026-02-17 · Red Hat rating Important
    nodejs:22 security update
    • Red Hat Enterprise Linux AppStream (v. 9) nodejs-1:22.22.0-1.module+el9.7.0+23896+b5802de9.aarch64::nodejs:22, nodejs-1:22.22.0-1.module+el9.7.0+23896+b5802de9.ppc64le::nodejs:22, nodejs-1:22.22.0-1.module+el9.7.0+23896+b5802de9.s390x::nodejs:22 +28
  • RHSA-2026:2781 Released 2026-02-17 · Red Hat rating Important
    nodejs:24 security update
    • Red Hat Enterprise Linux AppStream (v. 9) nodejs-1:24.13.0-1.module+el9.7.0+23894+c8377628.aarch64::nodejs:24, nodejs-1:24.13.0-1.module+el9.7.0+23894+c8377628.ppc64le::nodejs:24, nodejs-1:24.13.0-1.module+el9.7.0+23894+c8377628.s390x::nodejs:24 +25
  • RHSA-2026:2783 Released 2026-02-17 · Red Hat rating Important
    nodejs:20 security update
    • Red Hat Enterprise Linux AppStream (v. 9) nodejs-1:20.20.0-1.module+el9.7.0+23895+0637d423.aarch64::nodejs:20, nodejs-1:20.20.0-1.module+el9.7.0+23895+0637d423.ppc64le::nodejs:20, nodejs-1:20.20.0-1.module+el9.7.0+23895+0637d423.s390x::nodejs:20 +20
  • RHSA-2026:2768 Released 2026-02-17 · Red Hat rating Important
    nodejs:20 security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) nodejs-1:20.20.0-1.module+el9.4.0+23992+5dc31998.aarch64::nodejs:20, nodejs-1:20.20.0-1.module+el9.4.0+23992+5dc31998.ppc64le::nodejs:20, nodejs-1:20.20.0-1.module+el9.4.0+23992+5dc31998.s390x::nodejs:20 +20
  • RHSA-2026:2767 Released 2026-02-17 · Red Hat rating Important
    nodejs:20 security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) nodejs-1:20.20.0-1.module+el9.6.0+23988+6b9eae47.aarch64::nodejs:20, nodejs-1:20.20.0-1.module+el9.6.0+23988+6b9eae47.ppc64le::nodejs:20, nodejs-1:20.20.0-1.module+el9.6.0+23988+6b9eae47.s390x::nodejs:20 +20
  • RHSA-2026:2421 Released 2026-02-10 · Red Hat rating Important
    nodejs:22 security update
    • Red Hat Enterprise Linux AppStream (v. 8) nodejs-1:22.22.0-1.module+el8.10.0+23904+2c92f862.aarch64::nodejs:22, nodejs-1:22.22.0-1.module+el8.10.0+23904+2c92f862.ppc64le::nodejs:22, nodejs-1:22.22.0-1.module+el8.10.0+23904+2c92f862.s390x::nodejs:22 +28
  • RHSA-2026:2420 Released 2026-02-10 · Red Hat rating Important
    nodejs:24 security update
    • Red Hat Enterprise Linux AppStream (v. 8) nodejs-1:24.13.0-0.module+el8.10.0+23888+24fa7806.aarch64::nodejs:24, nodejs-1:24.13.0-0.module+el8.10.0+23888+24fa7806.ppc64le::nodejs:24, nodejs-1:24.13.0-0.module+el8.10.0+23888+24fa7806.s390x::nodejs:24 +25
  • RHSA-2026:2422 Released 2026-02-10 · Red Hat rating Important
    nodejs:20 security update
    • Red Hat Enterprise Linux AppStream (v. 8) nodejs-1:20.20.0-1.module+el8.10.0+23905+c49b2aec.aarch64::nodejs:20, nodejs-1:20.20.0-1.module+el8.10.0+23905+c49b2aec.ppc64le::nodejs:20, nodejs-1:20.20.0-1.module+el8.10.0+23905+c49b2aec.s390x::nodejs:20 +20
  • RHSA-2026:1843 Released 2026-02-05 · Red Hat rating Important
    nodejs22 security update
    • Red Hat Enterprise Linux AppStream (v. 10) nodejs-1:22.22.0-3.el10_1, nodejs-devel-1:22.22.0-3.el10_1, nodejs-docs-1:22.22.0-3.el10_1 +4
  • RHSA-2026:1842 Released 2026-02-05 · Red Hat rating Important
    nodejs24 security update
    • Red Hat Enterprise Linux AppStream (v. 10) nodejs24-1:24.13.0-1.el10_1, nodejs24-devel-1:24.13.0-1.el10_1, nodejs24-docs-1:24.13.0-1.el10_1 +3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    nodejs node 10.*, 11.* and 13 more versions

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2025-37010 Uncontrolled resource consumption in NodeJS nodePriority MEDIUM 46
    • TI-2025-34815 Buffer overflow in NodeJS nodePriority LOW 39
    Show all 3 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:1842, RHSA-2026:1843, RHSA-2026:7675
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:2420, RHSA-2026:2421, RHSA-2026:2422, RHSA-2026:7670
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:2781, RHSA-2026:2782, RHSA-2026:2783, RHSA-2026:7350
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:2899
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2026:2768
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:2767, RHSA-2026:2864
Red Hat Hardened ImagesFixed RHSA-2026:6402, RHSA-2026:6431, RHSA-2026:7386, RHSA-2026:7387
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-21637
  2. 2026-10-03 Alias added: GHSA-ggxc-26fx-987r
  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