# CVE-2026-105483: 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**.

CVE-2026-105483 is fixed in 21 products on 2 platforms, first by Node.js (LTS) 24.22.1, released October 20, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-105483
- Priority: High
- CVSS: 8.1 (Important)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 23, 2026
- Weakness: Improper Certificate Validation
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105483

## Description

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**.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Node.js | 26.12.1 | [Node.js 26.12.1](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs-26.12.1.md) | Oct 21, 2026 |
| Windows apps | Node.js (LTS) | 24.22.1 | [Node.js (LTS) 24.22.1](https://patchblox.com/security/data/fix/windows-app/openjs.nodejs.lts-24.22.1.md) | Oct 20, 2026 |
| Linux | nodejs RHEL 8 | 1:24.22.1-1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs RHEL 9 | 1:24.22.1-3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs almalinux 8 | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs almalinux 9 | 1:24.22.1-3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs ol 8 | 1:24.21.0-1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs ol 9 | 1:24.21.0-1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs rocky 9 | 1:24.22.1-3.module+el9.8.0+40401+e24b8c95 | [RLSA-2026:92378](https://patchblox.com/security/data/fix/linux/rlsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-devel RHEL 8 | 1:24.22.1-1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-devel RHEL 9 | 1:24.22.1-3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-devel almalinux 8 | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-devel almalinux 9 | 1:24.22.1-3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-devel ol 8 | 1:24.21.0-1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-devel ol 9 | 1:24.21.0-1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-docs RHEL 8 | 1:24.22.1-1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-docs RHEL 9 | 1:24.22.1-3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-docs almalinux 8 | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-docs almalinux 9 | 1:24.22.1-3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-docs ol 8 | 1:24.21.0-1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-docs ol 9 | 1:24.21.0-1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-full-i18n RHEL 8 | 1:24.22.1-1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-full-i18n RHEL 9 | 1:24.22.1-3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-full-i18n almalinux 8 | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-full-i18n almalinux 9 | 1:24.22.1-3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-full-i18n ol 8 | 1:24.21.0-1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-full-i18n ol 9 | 1:24.21.0-1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-libs RHEL 8 | 1:24.22.1-1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-libs RHEL 9 | 1:24.22.1-3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-libs almalinux 8 | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-libs almalinux 9 | 1:24.22.1-3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-libs ol 8 | 1:24.21.0-1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-libs ol 9 | 1:24.21.0-1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-nodemon RHEL 8 | 0:3.1.14-2.module+el8.10.0+24711+b610b202 | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-nodemon RHEL 9 | 0:3.1.14-3.module+el9.8.0+24708+e71d2e1d | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-nodemon almalinux 8 | 3.1.14-2.module_el8.10.0+4250+09238ed4 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-nodemon almalinux 9 | 3.1.14-3.module_el9.8.0+292+f4eaf8b2 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-nodemon ol 8 | 0:3.1.14-2.module+el8.10.0+91054+4b1a799c | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-nodemon ol 9 | 0:3.1.14-3.module+el9.8.0+91009+5d530ccd | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-nodemon rocky 8 | 0:3.1.14-2.module+el8.10.0+40277+b1b3f89e | [RLSA-2026:92376](https://patchblox.com/security/data/fix/linux/rlsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-nodemon rocky 9 | 0:3.1.14-3.module+el9.8.0+40281+14cc6568 | [RLSA-2026:92378](https://patchblox.com/security/data/fix/linux/rlsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-packaging RHEL 8 | 0:2021.06-6.module+el8.10.0+24711+b610b202 | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-packaging RHEL 9 | 0:2021.06-6.module+el9.8.0+24708+e71d2e1d | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-packaging almalinux 8 | 2021.06-6.module_el8.10.0+4086+70facd4a | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-packaging almalinux 9 | 2021.06-6.module_el9.7.0+209+ecf6523e | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-packaging ol 8 | 0:2021.06-6.module+el8.10.0+91054+4b1a799c | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-packaging ol 9 | 0:2021.06-6.module+el9.8.0+91009+5d530ccd | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-packaging rocky 8 | 0:2021.06-6.module+el8.10.0+40048+6d99f608 | [RLSA-2026:92376](https://patchblox.com/security/data/fix/linux/rlsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-packaging rocky 9 | 0:2021.06-6.module+el9.7.0+40165+d075e3f2 | [RLSA-2026:92378](https://patchblox.com/security/data/fix/linux/rlsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-packaging-bundler RHEL 8 | 0:2021.06-6.module+el8.10.0+24711+b610b202 | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | nodejs-packaging-bundler RHEL 9 | 0:2021.06-6.module+el9.8.0+24708+e71d2e1d | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | nodejs-packaging-bundler almalinux 8 | 2021.06-6.module_el8.10.0+4086+70facd4a | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-packaging-bundler almalinux 9 | 2021.06-6.module_el9.7.0+209+ecf6523e | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs-packaging-bundler ol 8 | 0:2021.06-6.module+el8.10.0+91054+4b1a799c | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | nodejs-packaging-bundler ol 9 | 0:2021.06-6.module+el9.8.0+91009+5d530ccd | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | nodejs24 amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 |
| Linux | nodejs24 sles 15.7 | 24.22.1-150700.15.21.1 | [SUSE-SU-2026:5037-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5037-1.md) | Nov 7, 2026 |
| Linux | nodejs24-debuginfo amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 |
| Linux | nodejs24-debugsource amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 |
| Linux | nodejs24-devel amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 |
| Linux | nodejs24-docs amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 |
| Linux | nodejs24-full-i18n amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 |
| Linux | nodejs24-libs amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 |
| Linux | nodejs24-libs-debuginfo amzn 2023 | 1:24.22.1-1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 |
| Linux | nodejs24-npm amzn 2023 | 1:11.19.1-1.24.22.1.1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 |
| Linux | npm RHEL 8 | 1:11.19.1-1.24.22.1.1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | npm RHEL 9 | 1:11.19.1-1.24.22.1.3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | npm almalinux 8 | 1:11.19.1-1.24.22.1.1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | npm almalinux 9 | 1:11.19.1-1.24.22.1.3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | npm ol 8 | 1:11.19.0-1.24.21.0.1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | npm ol 9 | 1:11.19.0-1.24.21.0.1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |
| Linux | v8-13.6-devel RHEL 8 | 3:13.6.233.17-1.24.22.1.1.module+el8.10.0+25218+d9e131cb | [RHSA-2026:92376](https://patchblox.com/security/data/fix/linux/rhsa-2026-92376.md) | Oct 30, 2026 |
| Linux | v8-13.6-devel RHEL 9 | 3:13.6.233.17-1.24.22.1.3.module+el9.8.0+25216+afa2a4a4 | [RHSA-2026:92378](https://patchblox.com/security/data/fix/linux/rhsa-2026-92378.md) | Oct 30, 2026 |
| Linux | v8-13.6-devel almalinux 8 | 3:13.6.233.17-1.24.22.1.1.module_el8.10.0+4331+0683c9c1 | [ALSA-2026:92376](https://patchblox.com/security/data/fix/linux/alsa-2026-92376.md) | Nov 7, 2026 |
| Linux | v8-13.6-devel almalinux 9 | 3:13.6.233.17-1.24.22.1.3.module_el9.8.0+333+788f3075 | [ALSA-2026:92378](https://patchblox.com/security/data/fix/linux/alsa-2026-92378.md) | Nov 7, 2026 |
| Linux | v8-13.6-devel amzn 2023 | 3:13.6.233.17-1.24.22.1.1.amzn2023.0.1 | [ALAS2023-2026-3330](https://patchblox.com/security/data/fix/linux/alas2023-2026-3330.md) | Nov 7, 2026 |
| Linux | v8-13.6-devel ol 8 | 3:13.6.233.17-1.24.21.0.1.0.1.module+el8.10.0+91090+8c7726c5 | [ELSA-2026-92376](https://patchblox.com/security/data/fix/linux/elsa-2026-92376.md) | Nov 7, 2026 |
| Linux | v8-13.6-devel ol 9 | 3:13.6.233.17-1.24.21.0.1.0.1.module+el9.8.0+91091+c060d8b4 | [ELSA-2026-92378](https://patchblox.com/security/data/fix/linux/elsa-2026-92378.md) | Nov 7, 2026 |

---

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