A memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the header.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Apr 9, 2026 · NIST NVD

   Detected

   A memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the 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 value can trigger excessive memory allocation and server termination, even without sending a request body.

2. Jun 17, 2026 · NIST NVD

   Updated

   A memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the 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 value can trigger excessive memory allocation and server termination, even without sending a request body.

Affected

• cpe orthanc-server/orthancversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-5440

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-5440

  A memory exhaustion vulnerability exists in the HTTP server due to unbounded use of the 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 larg

  nvd.nist.gov

References

• Third Party Advisory · kb.cert.org
• Not Applicable · machinespirits.de
• Product · orthanc-server.com