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CVE-2026-105482

HIGH 7.4

Published 2026-10-23 · Last modified 2026-10-23

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.

ELEVATED IMPACT

Severe if exploited (CVSS 7.4), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.4%chance of exploitation in 30 days · 36th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

7.4CVSS 3.0 · HIGH

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ⚠Complexity: Needs a race window or specific setup

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Nodejs

Products Node

Weakness (CWE)

  • CWE-284: Improper Access Control - Generic

CVSS vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References and research data (JSON)

Vendor product assessments

Showing 32 of 67 vendor product statements; 35 omitted. Read the full vendor advisory.

  • nodejs as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-docs as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-docs

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-npm as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-npm

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs24 as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs24

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs24-full-i18n as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs24-full-i18n

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs24-npm as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs24-npm

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs26.src as a component of Red Hat Enterprise Linux 10 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs26?arch=src

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-docs (nodejs:22) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-docs?rpmmod=nodejs:22

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-full-i18n (nodejs:22) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-full-i18n?rpmmod=nodejs:22

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-libs (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-libs?rpmmod=nodejs:24

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-nodemon.src (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-nodemon?arch=src&rpmmod=nodejs:24

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-nodemon (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-nodemon?rpmmod=nodejs:24

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-packaging.src (nodejs:22) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-packaging?arch=src&rpmmod=nodejs:22

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-packaging (nodejs:22) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-packaging?rpmmod=nodejs:22

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs.src (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs?arch=src&rpmmod=nodejs:24

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs?rpmmod=nodejs:24

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • npm (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/npm?rpmmod=nodejs:24

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • v8-13.6-devel (nodejs:22) as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/v8-13.6-devel?rpmmod=nodejs:22

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-docs (nodejs:22) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-docs?rpmmod=nodejs:22

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-full-i18n (nodejs:22) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-full-i18n?rpmmod=nodejs:22

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-full-i18n (nodejs:26) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-full-i18n?rpmmod=nodejs:26

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs-libs (nodejs:24) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs-libs?rpmmod=nodejs:24

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs.src (nodejs:24) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs?arch=src&rpmmod=nodejs:24

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs (nodejs:22) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/nodejs?rpmmod=nodejs:22

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • npm (nodejs:22) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/npm?rpmmod=nodejs:22

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • npm (nodejs:26) as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/npm?rpmmod=nodejs:26

    • workaround: To mitigate, do not pass untrusted strings into dns.resolve; reject hostnames that contain embedded NUL bytes before DNS resolution. Limit which components may perform DNS lookups on attacker-influenced names, and restrict network reachability of those services.
    • none available: Affected
    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • hi/nodejs as a component of Red Hat Hardened Images · known not affected

    Vendor assessment for this product only.

    Reason: component not present

    pkg:oci/nodejs@sha256:0b09273472d5eb02bd56df5e97aa44a9d6f406e117baef591d1edabdd4aa844a?repository_url=registry.redhat.io/hi/nodejs

    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs20.src as a component of Red Hat Hardened Images · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]?arch=src

    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs22.src as a component of Red Hat Hardened Images · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/nodejs22?arch=src

    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs24.src as a component of Red Hat Hardened Images · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/nodejs24?arch=src

    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs25.src as a component of Red Hat Hardened Images · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/[email protected]?arch=src

    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00
  • nodejs26.src as a component of Red Hat Hardened Images · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/nodejs26?arch=src

    Red Hat · CVE-2026-105482 · Updated 2026-10-23T18:19:21+00:00

Unverified PoC candidates

Catalogue matches for further research. These repositories have not been validated as working exploits.

2 candidates

All CVSS metrics

  • HIGH 7.4 v3.0 · CNA Primary
    CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  • HIGH 7.4 v3.0 · NVD Secondary
    CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS