libcpanel-json-xs-perl: Cpanel::JSON::XS versions before 4.80 for Perl allow stack exhaustion via nested tagged values under allow_tags in de...
CVE-2026-110673 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-110673, released October 24, 2026. It is not reported as exploited. Patch Radar priority: High.
Cpanel::JSON::XS versions before 4.80 for Perl allow stack exhaustion via nested tagged values under allow_tags in decode_tag. With allow_tags, "(" starts a tagged value. Its tag and value are decoded recursively, and each can start another tagged value. Unlike arrays and objects, this nesting is not counted against max_depth. A run of "(" bytes exhausts the C stack and triggers an uncatchable segmentation fault regardless of max_depth.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libcpanel-json-xs-perl · Debian 14 | 4.80-1 | DEBIAN-CVE-2026-110673 | Oct 24, 2026 |
| perl-Cpanel-JSON-XS · Fedora 43 | 4.80-1.fc43 | FEDORA-2026-4447E52D23 | Nov 7, 2026 |
| perl-Cpanel-JSON-XS · amzn 2023 | 4.25-2.amzn2023.0.10 | ALAS2023-2026-3352 | 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-debuginfo · amzn 2023 | 4.25-2.amzn2023.0.10 | ALAS2023-2026-3352 | Nov 7, 2026 |
| perl-Cpanel-JSON-XS-debugsource · Fedora 43 | 4.80-1.fc43 | FEDORA-2026-4447E52D23 | Nov 7, 2026 |
| perl-Cpanel-JSON-XS-debugsource · amzn 2023 | 4.25-2.amzn2023.0.10 | ALAS2023-2026-3352 | Nov 7, 2026 |
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