CVE-2026-68914: DoS

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.

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Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

CWE-674 CWE-674

References

Other References

https://github.com/mojolicious/mojo/commit/cc38b0554275c4d84f6b8b49bcbbc1bec2068fe1 https://github.com/mojolicious/mojo/security/advisories/GHSA-p5qf-qvw8-xgvg https://github.com/mojolicious/mojo/security/advisories/GHSA-p5qf-qvw8-xgvg

Frequently Asked Questions

What is CVE-2026-68914? +

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.

How do I check if I'm vulnerable to CVE-2026-68914? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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