datamodel-code-generator generates Python data models from schema definitions. Prior to 0.63.0, src/datamodelcodegenerator/http.py get_body reuses Authorization, Cookie, and Proxy-Authorization headers when following cross-origin redirects while fetching remote schemas, allowing credentials scoped to one schema host to be leaked to another redirect target. This issue is fixed in version 0.63.0.
{
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55403.json",
"cwe_ids": [
"CWE-200",
"CWE-601"
]
}{
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "0.63.0"
}
],
"source": [
"AFFECTED_FIELD",
"REFERENCES"
]
}