EUVD-2026-15954
GHSA-43v7-fp2v-68f6
Severity by source
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
5DescriptionGitHub Advisory
n8n is an open source workflow automation platform. Prior to version 2.5.0, when the Source Control feature is configured to use SSH, the SSH command used for git operations explicitly disabled host key verification. A network attacker positioned between the n8n instance and the remote Git server could intercept the connection and present a fraudulent host key, potentially injecting malicious content into workflows or intercepting repository data. This issue only affects instances where the Source Control feature has been explicitly enabled and configured to use SSH (non-default). The issue has been fixed in n8n version 2.5.0. Users should upgrade to this version or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Disable the Source Control feature if it is not actively required, and/or restrict network access to ensure the n8n instance communicates with the Git server only over trusted, controlled network paths. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
AnalysisAI
n8n versions prior to 2.5.0 contain a critical SSH host key verification bypass in the Source Control feature that allows network-positioned attackers to perform man-in-the-middle attacks against Git operations. Affected users who have explicitly enabled and configured SSH-based source control can have their workflows injected with malicious content or have repository data intercepted without authentication. …
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Vulnerability AssessmentAI
| Risk Assessment | The CVSS 6.3 score reflects a medium-severity network-based attack with moderate complexity and partial attack success conditions (AT:P indicates some prerequisite). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker positioned on the network path between an n8n instance and its configured Git server (e.g., a compromised ISP router, rogue WiFi access point, or cloud network MITM) intercepts the SSH connection during a workflow sync operation. The attacker presents a fraudulent SSH host key; because host key verification is disabled, the n8n client accepts the connection transparently. … |
| Remediation | Upgrade n8n to version 2.5.0 or later to remediate the vulnerability. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …
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