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TI-2026-79963 Aliases CVE-2026-106072

Node.js TLS hostname verification accepts non-canonical IPv4 hosts

Priority LOW 33CWE-295Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · Low
Fix status
Partial Red Hat: 2 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 22.x, 24.x and 26.x are affected, specifically versions 22.23.3, 24.22.0 and 26.12.0. The function tls.checkServerIdentity() normalizes non-canonical IPv4 spellings such as 127.1 and matches them against DNS names instead of treating them as IP addresses (CWE-295). An attacker holding a certificate from a CA the client trusts, with a numeric DNS name, can get it accepted for an IP endpoint on platforms whose resolver accepts these spellings, such as glibc.

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 with only a DNS SAN to authenticate an IP endpoint when the client connects using a non-canonical IPv4 spelling, such as `0177.0.0.1`, `0x7f.0.0.1`, `2130706433` or `127.1`. `tls.checkServerIdentity()` did not classify these hosts as IP addresses, but normalized them to their canonical form and matched the result against the certificate DNS names. A certificate containing `DNS:127.0.0.1` and no `IP Address:127.0.0.1` SAN was therefore accepted, while the same certificate is correctly rejected for `127.0.0.1`. Exploitation requires a certificate with a numeric DNS SAN issued by a CA trusted by the client, and a platform resolver that accepts these spellings, such as glibc. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00617 49th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 2 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
NodeJSnode22.23.3 – 22.23.3; 24.22.0 – 24.22.0; 26.12.0 – 26.12.0—No fix listedCNA
  • node VendorNodeJS Affected 22.23.3 – 22.23.3; 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

Install the fixed packages from Red Hat advisory RHSA-2026:92376 for Red Hat Enterprise Linux AppStream version 8 and RHSA-2026:92378 for Red Hat Enterprise Linux AppStream version 9. The sources list no fixed version for node. Red Hat Enterprise Linux 10, 8 and 9 are affected without a fix, and Red Hat lists no available plan for them.

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

Red Hat 2 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

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:92376
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:92378
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-23 Threatist record created from CVE-2026-106072
  2. 2026-10-24 Priority changed: MEDIUM → LOW
  3. 2026-10-26 Affected versions changed · Red Hat
  4. 2026-10-26 CVSS score added · Red Hat
  5. 2026-10-26 Affected versions changed · Red Hat
  6. 2026-10-30 Fix available: RHSA-2026:92378 · Red Hat
  7. 2026-10-30 Fix available: RHSA-2026:92376 · Red Hat
  8. 2026-10-30 Fix available: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream (v. 9) · Red Hat
  9. 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