CVE-2026-48818

Fixed in a distro release EPSS <1%CVSS 7.5

Starlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and earlier, StaticFiles on Windows is vulnerable to SSRF. An UNC path such as \\attacker.com\share can cause os.path.realpath to initiate an outbound SMB connection before the path is rejected, exposing the service account’s NTLMv2 credentials for offline cracking or relay even though the HTTP response is only a 404. The issue affects default follow_symlink=False deployments, including frameworks built on Starlette such as FastAPI; POSIX systems and follow_symlink=True are unaffected. The issue is fixed in 1.1.0.

Published 2026-06-17 · CVE record · OSV

Products: Kludex starlette, Red Hat AI Inference Server 3.3, Red Hat Exploit Intelligence, Red Hat Migration Toolkit for Applications 8, Red Hat OpenShift Lightspeed, Red Hat AI Inference Server, Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat Hardened Images, Red Hat OpenShift AI (RHOAI), Red Hat Satellite 6

Fixed upstream

Distro releases