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vuln-cve/data/2026/121xxx/CVE-2026-121821.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-121821",
"assignerOrgId": "657f3255-0560-4aed-82e4-7f579ec6acfb",
"state": "PUBLISHED",
"assignerShortName": "LY-Corporation",
"dateReserved": "2026-11-04T05:50:04.721Z",
"datePublished": "2026-11-06T07:46:50.787Z",
"dateUpdated": "2026-11-10T17:26:35.550Z"
},
"containers": {
"cna": {
"affected": [
{
"vendor": "LY Corporation",
"product": "Armeria",
"defaultStatus": "unaffected",
"versions": [
{
"version": "0.84.0",
"status": "affected",
"versionType": "custom",
"lessThan": "1.43.0"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "CWE-942"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability has been identified in armeria versions 0.84.0 through 1.42.0, where any-origin CORS policies do not enforce configured path restrictions, allowing an attacker-controlled website visited by an authenticated victim to read sensitive responses from excluded paths when credentials are enabled and the victim's browser sends authentication credentials."
}
],
"references": [
{
"url": "https://line.github.io/security-advisory-blog/CVE-2026-121821/"
},
{
"url": "https://github.com/line/armeria/security/advisories/GHSA-386q-mrg6-jfj8"
}
],
"metrics": [
{
"cvssV4_0": {
"version": "4.0",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"baseScore": 5.3,
"baseSeverity": "MEDIUM"
}
}
],
"providerMetadata": {
"orgId": "657f3255-0560-4aed-82e4-7f579ec6acfb",
"shortName": "LY-Corporation",
"dateUpdated": "2026-11-06T07:46:50.787Z"
}
},
"adp": [
{
"problemTypes": [
{
"descriptions": [
{
"type": "CWE",
"cweId": "CWE-942",
"lang": "en",
"description": "CWE-942 Permissive Cross-domain Policy with Untrusted Domains"
}
]
}
],
"references": [
{
"url": "https://github.com/line/armeria/security/advisories/GHSA-386q-mrg6-jfj8",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-11-10T17:26:30.974212Z",
"id": "CVE-2026-121821",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"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": "2026-11-10T17:26:35.550Z"
}
}
]
}
}