CVE-2026-105483
HIGH 7.4A 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**.
Severe if exploited (CVSS 7.4), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.3%chance of exploitation in 30 days · 20th percentile
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
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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:
Weakness (CWE)
- CWE-295: Improper Certificate Validation
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.
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 hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
nodejs24-docs as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/nodejs24-docs
- workaround: To mitigate do not pass untrusted hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
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 hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
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 hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
nodejs-docs (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/nodejs-docs?rpmmod=nodejs:24
- workaround: To mitigate do not pass untrusted hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
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 hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
nodejs-packaging-bundler (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/nodejs-packaging-bundler?rpmmod=nodejs:24
- workaround: To mitigate do not pass untrusted hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
nodejs-packaging (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/nodejs-packaging?rpmmod=nodejs:24
- workaround: To mitigate do not pass untrusted hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
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 hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
v8-12.4-devel (nodejs:24) as a component of Red Hat Enterprise Linux 8 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/v8-12.4-devel?rpmmod=nodejs:24
- workaround: To mitigate do not pass untrusted hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
nodejs-docs (nodejs:26) as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/nodejs-docs?rpmmod=nodejs:26
- workaround: To mitigate do not pass untrusted hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
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 hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
nodejs-libs (nodejs:26) as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/nodejs-libs?rpmmod=nodejs:26
- workaround: To mitigate do not pass untrusted hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
nodejs.src (nodejs:26) 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:26
- workaround: To mitigate do not pass untrusted hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
npm (nodejs:24) as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/npm?rpmmod=nodejs:24
- workaround: To mitigate do not pass untrusted hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- none available: Affected
nodejs25.src as a component of Red Hat Hardened Images · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/[email protected]?arch=src
- workaround: To mitigate do not pass untrusted hostnames that may contain non-ASCII or fullwidth digits into TLS clients such as tls.connect, https.request, or fetch. Restrict outbound TLS connections to trusted destinations only, and segment services that initiate TLS client connections from untrusted networks.
- no fix planned: Will not fix
nodejs as a component of Red Hat Enterprise Linux 10 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/nodejs
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs-docs as a component of Red Hat Enterprise Linux 10 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/nodejs-docs
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs-libs as a component of Red Hat Enterprise Linux 10 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/nodejs-libs
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs22.src as a component of Red Hat Enterprise Linux 10 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/nodejs22?arch=src
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs-docs (nodejs:22) as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/nodejs-docs?rpmmod=nodejs:22
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs-libs (nodejs:22) as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/nodejs-libs?rpmmod=nodejs:22
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs-nodemon (nodejs:22) as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/nodejs-nodemon?rpmmod=nodejs:22
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs-packaging.src (nodejs:22) as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/nodejs-packaging?arch=src&rpmmod=nodejs:22
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs (nodejs:22) as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/nodejs?rpmmod=nodejs:22
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00v8-12.4-devel (nodejs:22) as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/v8-12.4-devel?rpmmod=nodejs:22
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs-docs (nodejs:22) as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/nodejs-docs?rpmmod=nodejs:22
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs-libs (nodejs:22) as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/nodejs-libs?rpmmod=nodejs:22
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs (nodejs:22) as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/nodejs?rpmmod=nodejs:22
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00hi/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-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs22.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-2026-105483 · Updated 2026-10-23T18:19:30+00:00nodejs26.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-2026-105483 · Updated 2026-10-23T18:19:30+00:00
Unverified PoC candidates
Catalogue matches for further research. These repositories have not been validated as working exploits.
1 candidate
- https://github.com/CompleTetech-Security/node-cve-2026-105483-check
Offline Node.js evidence checker for CVE-2026-105483: TLS fullwidth-IP hostname validation bypass. Single-file Python; JSON/CSV/HTML reports; no exploit payloads.
PoC-in-GitHub · CVE-2026-105483
PoC-in-GitHub · CVE-2026-105483 · Updated 2026-10-26T05:10:54Z
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
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-105483.json Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-109100 EUVD · EUVD-2026-109100
Technical & other
- https://nodejs.org/en/blog/vulnerability/october-2026-security-releases CVE record · hackerone · Updated 2026-10-23T16:15:05.773Z
NVD · CVE-2026-105483 · Updated 2026-10-23T19:42:24.553
Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00 - https://access.redhat.com/security/cve/CVE-2026-105483 Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00
- https://bugzilla.redhat.com/show_bug.cgi?id=2559870 Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00
- https://www.cve.org/CVERecord?id=CVE-2026-105483 Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00
- https://nvd.nist.gov/vuln/detail/CVE-2026-105483 Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00
- https://nodejs.org/en/blog/release/v24.22.1 Red Hat · CVE-2026-105483 · Updated 2026-10-23T18:19:30+00:00