CVE-2026-110686: CWE-416 Use After Free
Description
CVE-2026-110686 is a use-after-free vulnerability in Cpanel::JSON::XS for Perl versions before 4.80. It occurs when filter callbacks remove themselves during JSON decoding, leading to use of freed memory and potential process crashes.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in Cpanel::JSON::XS versions prior to 4.80 where the decode function copies filter callbacks without taking references. If a filter callback removes the last single-key filter during decoding, it frees the callback table while the decode operation still uses it. This results in the next JSON object being processed through freed memory, causing a use-after-free condition that can crash the process.
Potential Impact
Exploitation of this vulnerability can cause the affected process to crash due to use-after-free memory access. There is no information about code execution or data corruption beyond process crashes. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade to Cpanel::JSON::XS version 4.80 or later where this issue is fixed. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- CPANSec
- Date Reserved
- 2026-10-14T13:26:57.076Z
- State
- PUBLISHED
Threat ID: 6ad662bc2cdf04f656803414
Added to database: 10/19/2026, 18:34:36 UTC
Last enriched: 10/19/2026, 18:48:29 UTC
Last updated: 10/19/2026, 19:06:46 UTC
Views: 5
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