[ruby-talk:444669] [ANN] Nokogiri security update v1.18.9

Nokogiri v1.18.9 has been released with a security update for CRuby users.

The release notes [1] are reproduced here for your convenience. See
GHSA-353f-x4gh-cqq8 [2] for more information.

  [1]: Release v1.18.9 / 2025-07-20 · sparklemotion/nokogiri · GitHub
  [2]:
Nokogiri patches vendored libxml2 to resolve multiple CVEs · Advisory · sparklemotion/nokogiri · GitHub

···

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## v1.18.9 / 2025-07-20

### Security

* [CRuby] Applied upstream libxml2 patches to address CVE-2025-6021,
CVE-2025-6170, CVE-2025-49794, CVE-2025-49795, and CVE-2025-49796. See
[GHSA-353f-x4gh-cqq8](
Nokogiri patches vendored libxml2 to resolve multiple CVEs · Advisory · sparklemotion/nokogiri · GitHub)
for more information.

### sha256 checksums

616817ac7b526a4d8695829f48df2169