CVEvulnerability
CVE-2026-5438
7.5 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-04-09
- Last modified
- 2026-10-26
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-770
Description
A gzip decompression bomb vulnerability exists when Orthanc processes HTTP request with `Content-Encoding: gzip`. The server does not enforce limits on decompressed size and allocates memory based on attacker-controlled compression metadata. A specially crafted gzip payload can trigger excessive memory allocation and exhaust system memory.
Affected configurations
• orthanc-server orthanc (< 1.12.11)
Related
Weakness · CWE (1)
- CWE-770 Allocation of Resources Without Limits or Throttling weakness
References
- https://kb.cert.org/vuls/id/536588 Third Party Advisory, VDB Entry
- https://www.machinespirits.de/ Not Applicable
- https://www.orthanc-server.com/ Product