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vuln-cve/data/2026/21xxx/CVE-2026-21879.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-21879",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-01-05T17:24:36.928Z",
"datePublished": "2026-01-08T00:51:50.954Z",
"dateUpdated": "2026-01-08T18:34:42.665Z"
},
"containers": {
"cna": {
"title": "Kanboard vulnerable to Open Redirect via protocol-relative URLs",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-601",
"lang": "en",
"description": "CWE-601: URL Redirection to Untrusted Site ('Open Redirect')",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.7,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcq",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcq"
},
{
"name": "https://github.com/kanboard/kanboard/commit/93bcae03301a6d34185a8dba977417e6b3de519f",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/kanboard/kanboard/commit/93bcae03301a6d34185a8dba977417e6b3de519f"
},
{
"name": "https://github.com/kanboard/kanboard/releases/tag/v1.2.49",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/kanboard/kanboard/releases/tag/v1.2.49"
}
],
"affected": [
{
"vendor": "kanboard",
"product": "kanboard",
"versions": [
{
"version": "< 1.2.49",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-01-08T00:51:50.954Z"
},
"descriptions": [
{
"lang": "en",
"value": "Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below are vulnerable to an Open Redirect attack that allows malicious actors to redirect authenticated users to attacker-controlled websites. By crafting URLs such as //evil.com, attackers can bypass the filter_var($url, FILTER_VALIDATE_URL) validation check. This vulnerability could be exploited to conduct phishing attacks, steal user credentials, or distribute malware. The issue is fixed in version 1.2.49."
}
],
"source": {
"advisory": "GHSA-mhv9-7m9w-7hcq",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/kanboard/kanboard/security/advisories/GHSA-mhv9-7m9w-7hcq",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-01-08T18:34:32.575700Z",
"id": "CVE-2026-21879",
"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": "2026-01-08T18:34:42.665Z"
}
}
]
}
}