CVE-2026-5440

HIGH

Memory Exhaustion via Unbounded Content-Length

Title source: cna
STIX 2.1

Description

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.

Scores

CVSS v3 7.5
EPSS 0.0164
EPSS Percentile 82.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (2)
Orthanc/DICOM Server < 1.12.10
orthanc-server/orthanc < 1.12.11
Published Apr 09, 2026
Tracked Since Apr 09, 2026