orthanc: A memory exhaustion vulnerability exists in ZIP archive processing
CVE-2026-5439 is fixed in orthanc on 1 platform by DEBIAN-CVE-2026-5439 (version 1.12.10+dfsg-4), released April 9, 2026. It is not reported as exploited. Patch Radar priority: High.
A memory exhaustion vulnerability exists in ZIP archive processing. Orthanc automatically extracts ZIP archives uploaded to certain endpoints and trusts metadata fields describing the uncompressed size of archived files. An attacker can craft a small ZIP archive containing a forged size value, causing the server to allocate extremely large buffers during extraction.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| orthanc · Debian 14 | 1.12.10+dfsg-4 | DEBIAN-CVE-2026-5439 | Apr 9, 2026 |
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