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CVE-2026-59208

n8n: Cross-Issuer Token Exchange Account Binding via Subject-Only Identity Resolution PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
n8n-io / n8naffected >= 2.28.0, < 2.28.1; affected < 2.27.4

CWE

CWE-287, CWE-346

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.