CVE-2026-68914: CWE-400: Uncontrolled Resource Consumption in mojolicious mojo
Mojolicious is a real-time web framework for Perl. Prior to 9.47, the pure-Perl implementation of Mojo::JSON does not limit nesting depth when Cpanel::JSON::XS is unavailable or MOJO_NO_JSON_XS is enabled. An attacker who can supply untrusted JSON to decode_json, from_json, or j can submit deeply nested arrays or objects, causing unbounded recursion, memory exhaustion, and a process crash. Applications using the Cpanel::JSON::XS backend are not affected because that backend already enforces a nesting limit. This issue is fixed in version 9.47.
AI Analysis
Technical Summary
Mojolicious is a Perl web framework whose pure-Perl JSON parser (Mojo::JSON) prior to version 9.47 does not enforce limits on JSON nesting depth when the Cpanel::JSON::XS backend is not used. An attacker supplying deeply nested JSON to functions like decode_json, from_json, or j can trigger unbounded recursion, causing uncontrolled resource consumption, memory exhaustion, and process crashes. The Cpanel::JSON::XS backend is not affected as it enforces nesting limits. This vulnerability is tracked as CVE-2026-68914 and is fixed in Mojolicious version 9.47.
Potential Impact
Exploitation of this vulnerability can lead to denial of service by crashing the application process due to memory exhaustion caused by unbounded recursion on deeply nested JSON input. There is no indication of privilege escalation or data disclosure. The impact is high due to the potential for service disruption.
Mitigation Recommendations
Upgrade Mojolicious to version 9.47 or later, where the issue is fixed. Applications relying on the Cpanel::JSON::XS backend are not affected. If upgrading is not immediately possible, ensure that the Cpanel::JSON::XS backend is enabled and used for JSON parsing to mitigate the risk.
CVE-2026-68914: CWE-400: Uncontrolled Resource Consumption in mojolicious mojo
Description
Mojolicious is a real-time web framework for Perl. Prior to 9.47, the pure-Perl implementation of Mojo::JSON does not limit nesting depth when Cpanel::JSON::XS is unavailable or MOJO_NO_JSON_XS is enabled. An attacker who can supply untrusted JSON to decode_json, from_json, or j can submit deeply nested arrays or objects, causing unbounded recursion, memory exhaustion, and a process crash. Applications using the Cpanel::JSON::XS backend are not affected because that backend already enforces a nesting limit. This issue is fixed in version 9.47.
CVSS v4.0
Score 8.7high
Affected software
mojolicious
mojo
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Mojolicious is a Perl web framework whose pure-Perl JSON parser (Mojo::JSON) prior to version 9.47 does not enforce limits on JSON nesting depth when the Cpanel::JSON::XS backend is not used. An attacker supplying deeply nested JSON to functions like decode_json, from_json, or j can trigger unbounded recursion, causing uncontrolled resource consumption, memory exhaustion, and process crashes. The Cpanel::JSON::XS backend is not affected as it enforces nesting limits. This vulnerability is tracked as CVE-2026-68914 and is fixed in Mojolicious version 9.47.
Potential Impact
Exploitation of this vulnerability can lead to denial of service by crashing the application process due to memory exhaustion caused by unbounded recursion on deeply nested JSON input. There is no indication of privilege escalation or data disclosure. The impact is high due to the potential for service disruption.
Mitigation Recommendations
Upgrade Mojolicious to version 9.47 or later, where the issue is fixed. Applications relying on the Cpanel::JSON::XS backend are not affected. If upgrading is not immediately possible, ensure that the Cpanel::JSON::XS backend is enabled and used for JSON parsing to mitigate the risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-31T21:04:04.040Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aad640855bf5e2cf53a6a49
Added to database: 09/18/2026, 16:17:12 UTC
Last enriched: 09/18/2026, 16:31:37 UTC
Last updated: 09/19/2026, 00:49:49 UTC
Views: 6
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