Mako is a template library written in Python. Prior to 1.3.11, TemplateLookup.get_template() is vulnerable to path traversal when a URI starts with // (e.g., //../../../secret.txt). The root cause is an inconsistency between two slash-stripping implementations. Any file readable by the process can be returned as rendered template content when an application passes untrusted input directly to TemplateLookup.get_template(). This vulnerability is fixed in 1.3.11.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-22"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41205.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:sqlalchemy:mako:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.3.11"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "e05ac61989a7fb9dd7dcde6cfd72dc48328719a3"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "rel_1_3_11",
"range": [
{
"fixed": "217822b548fdf9fd730b2f3c1f1e770d4c816df9"
}
],
"source": "REFERENCES_TAG"
}
]
}