libcpanel-json-xs-perl: Cpanel::JSON::XS versions from 4.43 before 4.80 for Perl misorder byte-string keys during canonical encoding in utf16...
CVE-2026-110687 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-110687, released October 24, 2026. It is not reported as exploited. Patch Radar priority: High.
Cpanel::JSON::XS versions from 4.43 before 4.80 for Perl misorder byte-string keys during canonical encoding in utf16_cmp. canonical sorts keys by UTF-16 code units. When any key in a hash is UTF-8 flagged, every key is decoded as UTF-8 for the comparison, including byte-string keys that the encoder writes out as Latin-1 characters. A byte-string key whose bytes are valid UTF-8 is sorted out of order, and two keys that encode differently can compare equal and are left in hash order. The same data can encode to different canonical documents across processes.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libcpanel-json-xs-perl · Debian 14 | 4.80-1 | DEBIAN-CVE-2026-110687 | Oct 24, 2026 |
| perl-Cpanel-JSON-XS · Fedora 43 | 4.80-1.fc43 | FEDORA-2026-4447E52D23 | Nov 7, 2026 |
| perl-Cpanel-JSON-XS · opensuse-leap 16.0 | 4.800.0-bp160.1.1 | OPENSUSE-SU-2026:22187-1 | Nov 7, 2026 |
| perl-Cpanel-JSON-XS · sles 15.7 | 4.800.0-150700.3.9.1 | SUSE-SU-2026:4926-1 | Nov 7, 2026 |
| perl-Cpanel-JSON-XS-debuginfo · Fedora 43 | 4.80-1.fc43 | FEDORA-2026-4447E52D23 | Nov 7, 2026 |
| perl-Cpanel-JSON-XS-debugsource · Fedora 43 | 4.80-1.fc43 | FEDORA-2026-4447E52D23 | Nov 7, 2026 |
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