high7.5
CVE-2026-5440
A memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the `Content-Length` header.
Impact
A memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the `Content-Length` header. The server allocates memory directly based on the attacker supplied header value without enforcing an upper limit. A crafted HTTP request containing an extremely large `Content-Length` value can trigger excessive memory allocation and server termination, even without sending a request body.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Orthanc-Server | Orthanc | before 1.12.11 |