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CVE-2026-5439

7.5 high SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 1

  1. First seenCVSS 7.5 · orthanc-serverNVD modified 2026-10-26 21:10

Affected (CPE criteria) 1

  • cpe:2.3:a:orthanc-server:orthanc:*:*:*:*:*:*:*:*

References 3