n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2.28.1, n8n instances configured with more than one trusted token-exchange issuer resolved external identities to local accounts using only the JWT sub claim and ignored the iss claim, allowing an attacker with a valid token from one trusted issuer and a sub matching a victim under another issuer to authenticate as that victim. This issue is fixed in versions 2.27.4 and 2.28.1.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59208.json",
"cwe_ids": [
"CWE-287",
"CWE-346"
],
"cna_assigner": "GitHub_M"
}{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "2.28.0"
},
{
"fixed": "2.28.1"
},
{
"introduced": "0"
},
{
"fixed": "2.27.4"
}
]
}