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CVE-2026-68914— Mojolicious pure-Perl Mojo::JSON decoder allows memory exhaustion via deeply nested data

Quick assessment

Affected
mojolicious mojo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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_js

CVSS 8.7 · High
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I. Basic Information for CVE-2026-68914

Vulnerability Information

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Vulnerability Title
Mojolicious pure-Perl Mojo::JSON decoder allows memory exhaustion via deeply nested data
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
mojolicious mojo < 9.47 -

II. Public POCs for CVE-2026-68914

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III. Intelligence Information for CVE-2026-68914

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Patches & Fixes for CVE-2026-68914 (1)

Other References for CVE-2026-68914 (1)

IV. Related Vulnerabilities

Same product: mojo
Same vendor: mojolicious
Same weakness: CWE-400

V. Comments for CVE-2026-68914

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