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vuln-cve/data/2026/31xxx/CVE-2026-31943.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-31943",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-03-10T15:10:10.656Z",
"datePublished": "2026-03-27T19:21:50.653Z",
"dateUpdated": "2026-03-31T19:10:14.342Z"
},
"containers": {
"cna": {
"title": "LibreChat has SSRF protection bypass via IPv4-mapped IPv6 normalization in isPrivateIP",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-918",
"lang": "en",
"description": "CWE-918: Server-Side Request Forgery (SSRF)",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/danny-avila/LibreChat/security/advisories/GHSA-w5r7-4f94-vp4c",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/danny-avila/LibreChat/security/advisories/GHSA-w5r7-4f94-vp4c"
}
],
"affected": [
{
"vendor": "danny-avila",
"product": "LibreChat",
"versions": [
{
"version": "< 0.8.3",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-03-27T19:21:50.653Z"
},
"descriptions": [
{
"lang": "en",
"value": "LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.3, `isPrivateIP()` in `packages/api/src/auth/domain.ts` fails to detect IPv4-mapped IPv6 addresses in their hex-normalized form, allowing any authenticated user to bypass SSRF protection and make the server issue HTTP requests to internal network resources — including cloud metadata services (e.g., AWS `169.254.169.254`), loopback, and RFC1918 ranges. Version 0.8.3 fixes the issue."
}
],
"source": {
"advisory": "GHSA-w5r7-4f94-vp4c",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/danny-avila/LibreChat/security/advisories/GHSA-w5r7-4f94-vp4c",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-03-31T18:38:43.982569Z",
"id": "CVE-2026-31943",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-03-31T19:10:14.342Z"
}
}
]
}
}