Improper input validation in NodeJS node
Priority LOW 29CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 3 fixed, 3 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
A flaw in Node.js URL processing causes an assertion failure in native code when `url.format()` is called with a malformed internationalized domain name (IDN) containing invalid characters, crashing the Node.js process.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00332 26th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 3 fixed, 3 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
Red Hat 3 advisories
- RHSA-2026:7670 Released 2026-04-13 · Red Hat rating Importantnodejs: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 Importantnodejs24 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-2026:7350 Released 2026-04-09 · Red Hat rating Importantnodejs: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
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux AppStream (v. 10) | Fixed | RHSA-2026:7675 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2026:7670 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2026:7350 |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-21712
- 2026-10-03 Alias added: GHSA-h8r7-m85c-mjhv
References
More NodeJS Node.js vulnerabilities
- 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
Sources
- CVE-2026-21712 · CVE Program
- CVE-2026-21712 · NVD
- FIRST EPSS
- GHSA-h8r7-m85c-mjhv · GitHub Advisory Database · CC BY 4.0
- CVE-2026-21712 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences