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vuln-cve/data/2026/73xxx/CVE-2026-73299.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-73299",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-08-11T19:42:11.450Z",
"datePublished": "2026-08-12T17:31:38.807Z",
"dateUpdated": "2026-08-12T18:54:20.646Z"
},
"containers": {
"cna": {
"title": "Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunjucks Renderer",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-94",
"lang": "en",
"description": "CWE-94: Improper Control of Generation of Code ('Code Injection')",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-1336",
"lang": "en",
"description": "CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 10,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/microsoft/prompty/security/advisories/GHSA-w28w-gp39-m4p6",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/microsoft/prompty/security/advisories/GHSA-w28w-gp39-m4p6"
},
{
"name": "https://github.com/microsoft/prompty/pull/404",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/microsoft/prompty/pull/404"
},
{
"name": "https://github.com/microsoft/prompty/pull/405",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/microsoft/prompty/pull/405"
},
{
"name": "https://github.com/microsoft/prompty/commit/e4a0ebf49e3a78d5d7796c8480bf9a4f0c54d19e",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/microsoft/prompty/commit/e4a0ebf49e3a78d5d7796c8480bf9a4f0c54d19e"
},
{
"name": "https://github.com/microsoft/prompty/commit/f5c57c94a0990cca79d095c3daab661b4b1fb89f",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/microsoft/prompty/commit/f5c57c94a0990cca79d095c3daab661b4b1fb89f"
},
{
"name": "https://github.com/microsoft/prompty/tree/typescript/2.0.0-beta.5",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/microsoft/prompty/tree/typescript/2.0.0-beta.5"
}
],
"affected": [
{
"vendor": "microsoft",
"product": "prompty",
"versions": [
{
"version": "< 0.1.5",
"status": "affected"
},
{
"version": ">= 2.0.0-alpha.1, < 2.0.0-beta.5",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-08-12T17:31:38.807Z"
},
"descriptions": [
{
"lang": "en",
"value": "Prompty is a markdown file format (.prompty) for LLM prompts. Prior to 0.1.5 and 2.0.0-beta.5, the TypeScript Nunjucks renderer evaluated untrusted .prompty template bodies with unrestricted JavaScript member access. An attacker-controlled template could traverse constructor and prototype properties to execute JavaScript in the host Node.js process. This issue is fixed in versions 0.1.5 and 2.0.0-beta.5."
}
],
"source": {
"advisory": "GHSA-w28w-gp39-m4p6",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-08-12T18:53:50.277151Z",
"id": "CVE-2026-73299",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-08-12T18:54:20.646Z"
}
}
]
}
}