CVE-2026-14803 (GCVE-0-2026-14803)
Vulnerability from cvelistv5 – Published: 2026-07-06 01:34 – Updated: 2026-07-06 05:27
VLAI
Title
Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder
Summary
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 `$c->req->json`, can exhaust process memory and cause denial of service.
Severity
No CVSS data available.
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SRI | Mojo::JSON |
Affected:
0 , < 9.47
(custom)
|
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-07-06T05:27:01.702Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/07/06/2"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://cpan.org/modules",
"defaultStatus": "unaffected",
"packageName": "Mojolicious",
"product": "Mojo::JSON",
"programFiles": [
"lib/Mojo/JSON.pm"
],
"programRoutines": [
{
"name": "Mojo::JSON::_decode_array"
},
{
"name": "Mojo::JSON::_decode_object"
}
],
"repo": "https://github.com/mojolicious/mojo",
"vendor": "SRI",
"versions": [
{
"lessThan": "9.47",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder.\n\nThe pure-Perl decode path (`_decode_value` dispatching to `_decode_array` and `_decode_object`) recurses with no depth limit, so a small deeply nested JSON document can consume excessive memory.\n\nThis path is the default when Cpanel::JSON::XS is not installed or `MOJO_NO_JSON_XS=1` is set; the Cpanel::JSON::XS fast path is not affected.\n\nAny caller that decodes an untrusted JSON body, for example `Mojo::Message::json` reached through `$c-\u003ereq-\u003ejson`, can exhaust process memory and cause denial of service."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-674",
"description": "CWE-674 Uncontrolled Recursion",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-06T01:34:43.872Z",
"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
"shortName": "CPANSec"
},
"references": [
{
"tags": [
"patch"
],
"url": "https://github.com/mojolicious/mojo/commit/cc38b0554275c4d84f6b8b49bcbbc1bec2068fe1.patch"
},
{
"tags": [
"release-notes"
],
"url": "https://metacpan.org/release/SRI/Mojolicious-9.47/changes"
}
],
"solutions": [
{
"lang": "en",
"value": "Upgrade to Mojolicious 9.47 or later."
}
],
"source": {
"discovery": "UNKNOWN"
},
"timeline": [
{
"lang": "en",
"time": "2026-07-05T00:00:00.000Z",
"value": "Version 9.47 released with fix."
}
],
"title": "Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder",
"workarounds": [
{
"lang": "en",
"value": "Where upgrading is not possible, install Cpanel::JSON::XS in the include path and leave `MOJO_NO_JSON_XS` unset."
}
],
"x_generator": {
"engine": "cpansec-cna-tool 0.1"
}
}
},
"cveMetadata": {
"assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
"assignerShortName": "CPANSec",
"cveId": "CVE-2026-14803",
"datePublished": "2026-07-06T01:34:43.872Z",
"dateReserved": "2026-07-05T21:23:29.979Z",
"dateUpdated": "2026-07-06T05:27:01.702Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-14803",
"date": "2026-07-06",
"epss": "0.00186",
"percentile": "0.0836"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-14803\",\"sourceIdentifier\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"published\":\"2026-07-06T02:16:21.683\",\"lastModified\":\"2026-07-06T06:16:27.863\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Mojo::JSON versions before 9.47 for Perl allow memory exhaustion via unbounded recursion in the pure-Perl decoder.\\n\\nThe 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.\\n\\nThis 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.\\n\\nAny caller that decodes an untrusted JSON body, for example `Mojo::Message::json` reached through `$c-\u003ereq-\u003ejson`, can exhaust process memory and cause denial of service.\"}],\"affected\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"affectedData\":[{\"vendor\":\"SRI\",\"product\":\"Mojo::JSON\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://cpan.org/modules\",\"packageName\":\"Mojolicious\",\"programFiles\":[\"lib/Mojo/JSON.pm\"],\"programRoutines\":[{\"name\":\"Mojo::JSON::_decode_array\"},{\"name\":\"Mojo::JSON::_decode_object\"}],\"repo\":\"https://github.com/mojolicious/mojo\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"9.47\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"weaknesses\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-674\"}]}],\"references\":[{\"url\":\"https://github.com/mojolicious/mojo/commit/cc38b0554275c4d84f6b8b49bcbbc1bec2068fe1.patch\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://metacpan.org/release/SRI/Mojolicious-9.47/changes\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/07/06/2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…