n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the Git node clone operation matched an attacker-controlled destination path against the default N8N_BLOCK_FILE_PATTERNS regular expression. The pattern ^(./).git(/.)$ allowed catastrophic backtracking and ran synchronously in the main n8n process. An authenticated workflow editor could therefore freeze the instance with one workflow execution; the affected default is declared in packages/@n8n/config/src/configs/security.config.ts. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-1333"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86081.json"
}{
"extracted_events": [
{
"introduced": "2.38.0"
},
{
"fixed": "2.38.2"
},
{
"introduced": "2.0.0"
},
{
"fixed": "2.37.7"
},
{
"introduced": "0"
},
{
"fixed": "1.123.76"
}
],
"source": "AFFECTED_FIELD"
}