Vulnerability · Published Oct 23, 2026 · Assigned by hackerone
CVE-2026-105483
High 7.4
In plain English
A high-severity improper certificate validation in node from nodejs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official 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**.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | nodejs | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | ALSA-2026:92376 |
| AlmaLinux:9 | nodejs | 1:24.22.1-3.module_el9.8.0+333+788f3075 | ALSA-2026:92378 |
| AlmaLinux:8 | nodejs-devel | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | ALSA-2026:92376 |
| AlmaLinux:9 | nodejs-devel | 1:24.22.1-3.module_el9.8.0+333+788f3075 | ALSA-2026:92378 |
| AlmaLinux:8 | nodejs-docs | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | ALSA-2026:92376 |
| AlmaLinux:9 | nodejs-docs | 1:24.22.1-3.module_el9.8.0+333+788f3075 | ALSA-2026:92378 |
| AlmaLinux:8 | nodejs-full-i18n | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | ALSA-2026:92376 |
| AlmaLinux:9 | nodejs-full-i18n | 1:24.22.1-3.module_el9.8.0+333+788f3075 | ALSA-2026:92378 |
| AlmaLinux:8 | nodejs-libs | 1:24.22.1-1.module_el8.10.0+4331+0683c9c1 | ALSA-2026:92376 |
| AlmaLinux:9 | nodejs-libs | 1:24.22.1-3.module_el9.8.0+333+788f3075 | ALSA-2026:92378 |
| AlmaLinux:8 | nodejs-nodemon | 3.1.14-2.module_el8.10.0+4250+09238ed4 | ALSA-2026:92376 |
| AlmaLinux:9 | nodejs-nodemon | 3.1.14-3.module_el9.8.0+292+f4eaf8b2 | ALSA-2026:92378 |
| AlmaLinux:8 | nodejs-packaging | 2021.06-6.module_el8.10.0+4086+70facd4a | ALSA-2026:92376 |
| AlmaLinux:9 | nodejs-packaging | 2021.06-6.module_el9.7.0+209+ecf6523e | ALSA-2026:92378 |
| AlmaLinux:8 | nodejs-packaging-bundler | 2021.06-6.module_el8.10.0+4086+70facd4a | ALSA-2026:92376 |
| AlmaLinux:9 | nodejs-packaging-bundler | 2021.06-6.module_el9.7.0+209+ecf6523e | ALSA-2026:92378 |
| AlmaLinux:8 | npm | 1:11.19.1-1.24.22.1.1.module_el8.10.0+4331+0683c9c1 | ALSA-2026:92376 |
| AlmaLinux:9 | npm | 1:11.19.1-1.24.22.1.3.module_el9.8.0+333+788f3075 | ALSA-2026:92378 |
| AlmaLinux:8 | v8-13.6-devel | 3:13.6.233.17-1.24.22.1.1.module_el8.10.0+4331+0683c9c1 | ALSA-2026:92376 |
| AlmaLinux:9 | v8-13.6-devel | 3:13.6.233.17-1.24.22.1.3.module_el9.8.0+333+788f3075 | ALSA-2026:92378 |
| Alpine:v3.23 | nodejs | 24.22.1-r0 | ALPINE-CVE-2026-105483 |
| Alpine:v3.24 | nodejs | 24.22.1-r0 | ALPINE-CVE-2026-105483 |
| Alpine:v3.24 | nodejs-current | 26.12.1-r0 | ALPINE-CVE-2026-105483 |
| Debian:14 | nodejs | no fix listed | DEBIAN-CVE-2026-105483 |
| Rocky Linux:9 | nodejs | 1:24.22.1-3.module+el9.8.0+40401+e24b8c95 | RLSA-2026:92378 |
| Rocky Linux:8 | nodejs-nodemon | 0:3.1.14-2.module+el8.10.0+40278+50b003a3 | RLSA-2026:92376 |
| Rocky Linux:8 | nodejs-nodemon | 0:3.1.14-2.module+el8.10.0+40277+b1b3f89e | RLSA-2026:92376 |
| Rocky Linux:9 | nodejs-nodemon | 0:3.1.14-3.module+el9.8.0+40281+14cc6568 | RLSA-2026:92378 |
| Rocky Linux:8 | nodejs-packaging | 0:2021.06-6.module+el8.10.0+40172+38f6fdd1 | RLSA-2026:92376 |
| Rocky Linux:8 | nodejs-packaging | 0:2021.06-6.module+el8.10.0+40048+6d99f608 | RLSA-2026:92376 |
| Rocky Linux:8 | nodejs-packaging | 0:2021.06-6.module+el8.10.0+40171+8fa9c325 | RLSA-2026:92376 |
| Rocky Linux:9 | nodejs-packaging | 0:2021.06-6.module+el9.7.0+40052+e32ea525 | RLSA-2026:92378 |
| Rocky Linux:9 | nodejs-packaging | 0:2021.06-6.module+el9.7.0+40165+d075e3f2 | RLSA-2026:92378 |
| Rocky Linux:9 | nodejs-packaging | 0:2021.06-6.module+el9.8.0+40164+8921ab53 | RLSA-2026:92378 |
| Rocky Linux:9 | nodejs-packaging | 0:2021.06-6.module+el9.7.0+40153+4d595597 | RLSA-2026:92378 |
| Ubuntu:24.04:LTS | nodejs | no fix listed | UBUNTU-CVE-2026-105483 |
| Ubuntu:26.04:LTS | nodejs | no fix listed | UBUNTU-CVE-2026-105483 |
| Ubuntu:26.10 | nodejs | no fix listed | UBUNTU-CVE-2026-105483 |
Affected products (as reported)
Weakness: CWE-295 · Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N