Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Orthanc-Server | Orthanc | < 1.12.11 |
Related Weaknesses (CWE)
References
- https://kb.cert.org/vuls/id/536588Third Party AdvisoryVDB Entry
- https://www.machinespirits.de/Not Applicable
- https://www.orthanc-server.com/Product
FAQ
What is CVE-2026-5440?
CVE-2026-5440 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 witho...
How severe is CVE-2026-5440?
CVE-2026-5440 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-5440?
Check the references section above for vendor advisories and patch information. Affected products include: Orthanc-Server Orthanc.