openSUSE-SU-2026:21480-1

Description of the patch:

This update for mcphost fixes the following issues:

• CVE-2026-5160: github.com/yuin/goldmark/renderer: Cross-site Scripting due to improper URL validation (bsc#1272488).
• CVE-2026-39821: golang.org/x/net/idna: failure to reject ASCII-only Punycode-encoded labels allows for validation bypass and privilege escalation (bsc#1266572).
• CVE-2026-56852: golang.org/x/text/unicode/norm: infinite loop on truncated/invalid UTF-8 input (bsc#1272131).