CVE-2026-5440: 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…

PriorityP344high7.5CVSS 3.1

AVNACLPRNUINSUCNINAH

EPSS

0.57%

42.7th percentile

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

3 ranges

Vendor	Product	Version range	Fixed in
debian	orthanc	—	—
orthanc-server	orthanc	< 1.12.11	1.12.11
orthanc	dicom_server	<= 1.12.10	—

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