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.
Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| unaffected |
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Vendor Solution
Upgrade to Cpanel-JSON-XS 4.80 or later.
Tracking
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Mon, 19 Oct 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Cpanel::JSON::XS versions before 4.80 for Perl allow stack exhaustion via nested tagged values under allow_tags in decode_tag | |
| Weaknesses | CWE-674 | |
| References |
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-10-19T18:11:15.412Z
Reserved: 2026-10-14T13:22:59.046Z
Link: CVE-2026-110673
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2026-10-19T19:17:20.877
Modified: 2026-10-19T20:50:17.967
Link: CVE-2026-110673
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-10-19T20:00:04Z
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CWE-674
Uncontrolled Recursion