CVE-2026-16723 (GCVE-0-2026-16723)
Vulnerability from cvelistv5 – Published: 2026-07-23 08:26 – Updated: 2026-07-23 08:26
VLAI
EPSS
VEX
Title
Remote Code Execution in fastjson 1.2.68–1.2.83
Summary
A remote code execution (RCE) vulnerability exists in fastjson 1.2.68 through 1.2.83. This vulnerability is exploitable under fastjson's stock default configuration — no AutoType enablement required, no classpath gadget required.
Severity
9 (Critical)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/alibaba/fastjson2/wiki/Securit… | vendor-advisorymitigation |
Impacted products
Credits
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Fastjson",
"vendor": "Alibaba",
"versions": [
{
"lessThanOrEqual": "1.2.83",
"status": "affected",
"version": "1.2.68",
"versionType": "custom"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Kirill Firsov of FearsOff Cybersecurity"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eA remote code execution (RCE) vulnerability exists in fastjson 1.2.68 through 1.2.83. This vulnerability is exploitable under fastjson\u0027s\u0026nbsp;\u003cstrong\u003estock default configuration\u003c/strong\u003e\u0026nbsp;\u2014 no AutoType enablement required, no classpath gadget required.\u003c/p\u003e"
}
],
"value": "A remote code execution (RCE) vulnerability exists in fastjson 1.2.68 through 1.2.83. This vulnerability is exploitable under fastjson\u0027s\u00a0stock default configuration\u00a0\u2014 no AutoType enablement required, no classpath gadget required."
}
],
"impacts": [
{
"capecId": "CAPEC-586",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-586 Object Injection"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20 Improper input validation",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-502",
"description": "CWE-502 Deserialization of untrusted data",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-23T08:26:24.453Z",
"orgId": "0cc2b86d-1d45-434d-ae74-11d09ec61ae8",
"shortName": "alibaba"
},
"references": [
{
"tags": [
"vendor-advisory",
"mitigation"
],
"url": "https://github.com/alibaba/fastjson2/wiki/Security-Advisory:-Remote-Code-Execution-in-fastjson-1.2.68%E2%80%931.2.83"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Remote Code Execution in fastjson 1.2.68\u20131.2.83",
"x_generator": {
"engine": "Vulnogram 1.0.4"
}
}
},
"cveMetadata": {
"assignerOrgId": "0cc2b86d-1d45-434d-ae74-11d09ec61ae8",
"assignerShortName": "alibaba",
"cveId": "CVE-2026-16723",
"datePublished": "2026-07-23T08:26:24.453Z",
"dateReserved": "2026-07-23T02:40:02.606Z",
"dateUpdated": "2026-07-23T08:26:24.453Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-16723",
"date": "2026-07-23",
"epss": "0.00663",
"percentile": "0.47904"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-16723\",\"sourceIdentifier\":\"alibaba-cna@list.alibaba-inc.com\",\"published\":\"2026-07-23T09:16:26.700\",\"lastModified\":\"2026-07-23T09:16:26.700\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A remote code execution (RCE) vulnerability exists in fastjson 1.2.68 through 1.2.83. This vulnerability is exploitable under fastjson\u0027s\u00a0stock default configuration\u00a0\u2014 no AutoType enablement required, no classpath gadget required.\"}],\"affected\":[{\"source\":\"alibaba-cna@list.alibaba-inc.com\",\"affectedData\":[{\"vendor\":\"Alibaba\",\"product\":\"Fastjson\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"1.2.68\",\"lessThanOrEqual\":\"1.2.83\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"alibaba-cna@list.alibaba-inc.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H\",\"baseScore\":9.0,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.2,\"impactScore\":6.0}]},\"weaknesses\":[{\"source\":\"alibaba-cna@list.alibaba-inc.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-20\"},{\"lang\":\"en\",\"value\":\"CWE-502\"}]}],\"references\":[{\"url\":\"https://github.com/alibaba/fastjson2/wiki/Security-Advisory:-Remote-Code-Execution-in-fastjson-1.2.68%E2%80%931.2.83\",\"source\":\"alibaba-cna@list.alibaba-inc.com\"}]}}"
}
}
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…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
Loading…
Loading…