High [CVE-2026-105483] TLS certificate hostname bypass via fullwidth-digit IP hostnames
This high-severity Red Hat Linux advisory covers CVE-2026-105483; related products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.
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Summary
TLS certificate hostname bypass via fullwidth-digit IP hostnames. Red Hat rates this important (CVSS 7.4).
Weakness: CWE-297.
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images; and 2 more.
Affected products named by the advisory: Red Hat package: nodejs24; Red Hat package: nodejs26.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
Mitigation checklist
- 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.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
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