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TI-2026-79959 Aliases CVE-2026-105483

Node.js TLS hostname check accepts certificates for IPv4 hosts

Priority LOW 34CWE-295Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 3 fixed, 3 without a fix

Attack profile from CVSS 3.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-295.

Summary

Node.js versions 24.22.0 and 26.12.0 are affected. The tls.checkServerIdentity() function does not recognize hosts written with non-ASCII characters, such as fullwidth digits, as IPv4 addresses, so it matches them against certificate DNS names and Common Name instead (CWE-295). A remote attacker without credentials can present a certificate issued for a DNS name such as 127.0.0.1 to impersonate an IP endpoint, but the attack is hard to carry out.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

A flaw in Node.js TLS hostname verification allows a certificate without a matching IP address SAN to authenticate a connection to an IPv4 address when the host is written with non-ASCII characters, such as fullwidth digits (`１２７.0.0.1`). `tls.checkServerIdentity()` did not recognize such hosts as IP addresses, even though they normalize and resolve to a regular IPv4 address, and matched them against the certificate DNS names and Common Name instead. A certificate containing `DNS:127.0.0.1` or `DNS:*.0.0.1` could therefore be accepted for an IP endpoint it was not issued for. This is a regression introduced after the fix for CVE-2026-48618. This vulnerability affects Node.js **26.x** and **24.x**.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00304 23rd percentileScored 2026-11-07
Fix Partial Red Hat: 5 advisoriesRed Hat: 3 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
NodeJSnode24.22.0 – 24.22.0; 26.12.0 – 26.12.0—No fix listedCNA
  • node VendorNodeJS Affected 24.22.0 – 24.22.0; 26.12.0 – 26.12.0 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:nodejs:node.js:*:*:*:*:*:*:*:*——NodeJS
  • cpe:2.3:a:nodejs:node.js:*:*:*:*:*:*:*:* Versions — — ·NodeJS

Remediation

No fixed Node.js version is listed in the sources. Red Hat has fixed it in RHSA-2026:92378 for Red Hat Enterprise Linux AppStream 9, RHSA-2026:92376 for Red Hat Enterprise Linux AppStream 8, and RHSA-2026:89206, RHSA-2026:87703 and RHSA-2026:87702 for Red Hat Hardened Images. Red Hat Enterprise Linux 10 and Red Hat Enterprise Linux 9 have no fix plan available, and Red Hat Hardened Images has no fix planned.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Red Hat 5 advisories

  • RHSA-2026:92378 Released 2026-10-29 · Red Hat rating Important
    nodejs:24 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) nodejs-1:24.22.1-3.module+el9.8.0+25216+afa2a4a4.aarch64::nodejs:24, nodejs-1:24.22.1-3.module+el9.8.0+25216+afa2a4a4.ppc64le::nodejs:24, nodejs-1:24.22.1-3.module+el9.8.0+25216+afa2a4a4.s390x::nodejs:24 +25
  • RHSA-2026:92376 Released 2026-10-29 · Red Hat rating Important
    nodejs:24 security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) nodejs-1:24.22.1-1.module+el8.10.0+25218+d9e131cb.aarch64::nodejs:24, nodejs-1:24.22.1-1.module+el8.10.0+25218+d9e131cb.ppc64le::nodejs:24, nodejs-1:24.22.1-1.module+el8.10.0+25218+d9e131cb.s390x::nodejs:24 +25
  • RHSA-2026:89206 Released 2026-10-25 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images nodejs24-1:24.22.1-3.hum1@aarch64, nodejs24-1:24.22.1-3.hum1@s390x, nodejs24-1:24.22.1-3.hum1@src +22
Show 2 more Red Hat advisories
  • RHSA-2026:87703 Released 2026-10-22 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images nodejs26-1:26.12.1-0.1.hum1@aarch64, nodejs26-1:26.12.1-0.1.hum1@s390x, nodejs26-1:26.12.1-0.1.hum1@src +22
  • RHSA-2026:87702 Released 2026-10-22 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images nodejs22-1:22.23.4-2.3.2.3.hum1@aarch64, nodejs22-1:22.23.4-2.3.2.3.hum1@s390x, nodejs22-1:22.23.4-2.3.2.3.hum1@src +22

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Hardened ImagesAffectedNo fix planned: Will not fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:92376
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:92378
Red Hat Hardened ImagesFixed RHSA-2026:87702, RHSA-2026:87703, RHSA-2026:89206
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. 2026-10-23 Threatist record created from CVE-2026-105483
  2. 2026-10-24 Priority changed: MEDIUM → LOW
  3. 2026-10-24 Affected versions changed · Red Hat
  4. 2026-10-24 CVSS score added · Red Hat
  5. 2026-10-29 Fix available: RHSA-2026:87703 · Red Hat
  6. 2026-10-29 Fix available: Red Hat Hardened Images · Red Hat
  7. 2026-10-30 Fix available: RHSA-2026:87702 · Red Hat
  8. 2026-10-30 Fix available: RHSA-2026:89206 · Red Hat
  9. 2026-10-30 Fix available: RHSA-2026:92378 · Red Hat
  10. 2026-10-30 Fix available: RHSA-2026:92376 · Red Hat
  11. 2026-10-30 Fix available: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream (v. 9) · Red Hat
  12. 2026-11-02 CISA SSVC decision points changed

References

Other 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-2024-18584 Race condition in NodeJS Node CVSS 3.0HIGH 8.2
  • 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
See all 295 →

Sources

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