CVE-2026-110681
Cpanel::JSON::XS versions before 4.80 for Perl use the parent interpreter's scalars from a parser object cloned into a new ithread
Published Oct 19, 2026
CVSS 3.1 · 8.1 High
EPSS < 1%
KEV · Not listed
Description
Cpanel::JSON::XS versions before 4.80 for Perl use the parent interpreter's scalars from a parser object cloned into a new ithread.
A parser object holds its callbacks and its incremental parse buffer as raw scalar pointers. When a thread is created, these are copied into the new interpreter unchanged, so the child's parser uses, and later frees, scalars that belong to the parent and may already have been freed there.
A parser created before a thread starts and used inside it can call freed callbacks, corrupt reference counts and crash the process.
A parser object holds its callbacks and its incremental parse buffer as raw scalar pointers. When a thread is created, these are copied into the new interpreter unchanged, so the child's parser uses, and later frees, scalars that belong to the parent and may already have been freed there.
A parser created before a thread starts and used inside it can call freed callbacks, corrupt reference counts and crash the process.
Affected Products
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CVE record
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NVD configurations
No data
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Red Hat packages
No data
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OpenCVE enrichment
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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No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Rurban | Cpanel::json::xs |
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Remediation
Vendor Solution
Upgrade to Cpanel-JSON-XS 4.80 or later.
Tracking
Advisories
Metrics
No CVSS v4.0
Attack Vector Network
Attack Complexity Low
Privileges Required Low
Scope Unchanged
Confidentiality Impact None
Integrity Impact High
Availability Impact High
User Interaction None
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.429% probability within 30 days)
Exploitation none
Automatable yes
Technical Impact total
References
History
Oct 30, 2026 12:30 PM
Scoring metrics updated
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| Metrics |
ssvc
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Oct 30, 2026 11:30 AM
Scoring metrics updated
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| Type | Values Removed | Values Added |
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| Metrics |
cvssV3_1
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Oct 19, 2026 9:00 PM
First appearance in the feed. Affected vendors updated
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Rurban
Rurban cpanel::json::xs |
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| Vendors & Products |
Rurban
Rurban cpanel::json::xs |
Oct 19, 2026 6:30 PM
Description updated. Title updated. Weaknesses updated. Added references
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Cpanel::JSON::XS versions before 4.80 for Perl use the parent interpreter's scalars from a parser object cloned into a new ithread. A parser object holds its callbacks and its incremental parse buffer as raw scalar pointers. When a thread is created, these are copied into the new interpreter unchanged, so the child's parser uses, and later frees, scalars that belong to the parent and may already have been freed there. A parser created before a thread starts and used inside it can call freed callbacks, corrupt reference counts and crash the process. | |
| Title | Cpanel::JSON::XS versions before 4.80 for Perl use the parent interpreter's scalars from a parser object cloned into a new ithread | |
| Weaknesses | CWE-416 | |
| References |
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Subscriptions
Weaknesses
