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TI-2026-79958 Aliases CVE-2026-105482

NUL byte truncation of hostnames in Node.js DNS resolve functions

Priority LOW 35CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 3 fixed, 4 without a fix

Attack profile from CVSS 3.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-284.

Summary

Node.js 22.23.3, 24.22.0 and 26.12.0 are affected. The dns.resolve*() functions and dns.reverse() silently truncate a hostname at a NUL byte because the name is passed to c-ares as a C string (CWE-284). An application that validates a hostname and then resolves it with these functions can act on records for a different name, and an attacker who controls the input can trigger this without privileges. This is an incomplete fix of an earlier flaw (CVE-2026-48930) that covered only dns.lookup() and the net/tls host options.

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

Description from the CNA

A flaw in Node.js DNS resolution allows hostnames containing a NUL byte to be silently truncated by the dns.resolve*() functions and dns.reverse(). This is an incomplete fix of CVE-2026-48930, which only covered dns.lookup() and the net/tls host options. Because the name is passed to c-ares as a C string, resolving attacker.example\0.trusted.example queries attacker.example and returns its records without any error. Applications that validate a hostname, for example against a domain allowlist, and then resolve it with dns.resolve*() can act on records for a different name than the one they validated. 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 0.00468 40th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 3 fixed, 4 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

The sources list no fixed version for Node.js. Red Hat fixes it in Red Hat Enterprise Linux AppStream 8 and 9 through RHSA-2026:92376 and RHSA-2026:92378, and in Red Hat Hardened Images through RHSA-2026:87702 and RHSA-2026:87703. Red Hat has no fix available for Red Hat Enterprise Linux 8, 9 and 10.

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

Red Hat 4 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-2026:87703 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
Show 1 more Red Hat advisories
  • 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 8AffectedNo 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
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-23 Threatist record created from CVE-2026-105482
  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-2026:92378 · Red Hat
  9. 2026-10-30 Fix available: RHSA-2026:92376 · Red Hat
  10. 2026-10-30 Fix available: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream (v. 9) · Red Hat
  11. 2026-10-30 Affected versions changed · 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