CVE-2026-14803

Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder. The pure-Perl decode path (`_decode_value` dispatching to `_decode_array` and `_decode_object`) recurses with no depth limit, so a small deeply nested JSON document can consume excessive memory. This path is the default when Cpanel::JSON::XS is not installed or `MOJO_NO_JSON_XS=1` is set; the Cpanel::JSON::XS fast path is not affected. Any caller that decodes an untrusted JSON body, for example `Mojo::Message::json` reached through `$c->req->json`, can exhaust process memory and cause denial of service.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/mojolicious/mojo/commit/cc38b0554275c4d84f6b8b49bcbbc1bec2068fe1.patch
https://metacpan.org/release/SRI/Mojolicious-9.47/changes
http://www.openwall.com/lists/oss-security/2026/07/06/2

Configurations

No configuration.

History

06 Jul 2026, 19:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5

06 Jul 2026, 06:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/07/06/2 -

06 Jul 2026, 02:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-06 02:16

Updated : 2026-07-06 19:16

NVD link : CVE-2026-14803

Mitre link : CVE-2026-14803

CVE.ORG link : CVE-2026-14803

JSON object : View

Products Affected

No product.

CWE

CWE-674

Uncontrolled Recursion

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