CVE-2026-5439 | Orthanc DICOM Server up to 1.12.10 ZIP Archive size allocation of resources

VDB-356592 · CVE-2026-5439 · EUVD-2026-20916 ORTHANC DICOM SERVER UP TO 1.12.10 ZIP ARCHIVE SIZE ALLOCATION OF RESOURCES HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.3 $0-$5k 0.61+ Summaryinfo A vulnerability described as problematic has been identified in Orthanc DICOM Server up to 1.12.10. Impacted is an unknown function of the component ZIP Archive Handler. The manipulation of the argument size results in allocation of resources. This vulnerability is reported as CVE-2026-5439. The attack can be launched remotely. No exploit exists. Detailsinfo A vulnerability, which was classified as problematic, was found in Orthanc DICOM Server up to 1.12.10. Affected is an unknown code block of the component ZIP Archive Handler. The manipulation of the argument size with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. CVE summarizes: 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. This vulnerability is traded as CVE-2026-5439 since 04/02/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-20916). Productinfo Vendor Orthanc Name DICOM Server Version 1.12.0 1.12.1 1.12.2 1.12.3 1.12.4 1.12.5 1.12.6 1.12.7 1.12.8 1.12.9 1.12.10 CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 4.3 VulDB Meta Temp Score: 4.3 VulDB Base Score: 4.3 VulDB Temp Score: 4.3 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Allocation of resources CWE: CWE-770 / CWE-400 / CWE-404 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 04/02/2026 CVE reserved 04/09/2026 +7 days Advisory disclosed 04/09/2026 +0 days VulDB entry created 04/09/2026 +0 days VulDB entry last update Sourcesinfo Status: Not defined CVE: CVE-2026-5439 (🔒) GCVE (CVE): GCVE-0-2026-5439 GCVE (VulDB): GCVE-100-356592 EUVD: 🔒 Entryinfo Created: 04/09/2026 17:39 Updated: 04/09/2026 18:26 Changes: 04/09/2026 17:39 (52), 04/09/2026 18:26 (1) Complete: 🔍 Cache ID: 99:C25:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸