CVE-2026-5443

A heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images. Pixel length validation uses 32-bit multiplication for width and height calculations. If these values overflow, the validation check incorrectly succeeds, allowing the decoder to read and write to memory beyond allocated buffers.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://kb.cert.org/vuls/id/536588	Third Party Advisory VDB Entry
https://www.machinespirits.de/	Not Applicable
https://www.orthanc-server.com/	Product

Configurations

Configuration 1 (hide)

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

History

26 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) Existe una vulnerabilidad de desbordamiento de búfer en el heap durante la decodificación de imágenes DICOM ’PALETTE COLOR’. La validación de la longitud de píxeles utiliza multiplicación de 32 bits para los cálculos de ancho y alto. Si estos valores se desbordan, la comprobación de validación tiene éxito de forma incorrecta, lo que permite al decodificador leer y escribir en la memoria más allá de los búferes asignados.

Information

Published : 2026-04-09 15:16

Updated : 2026-10-26 21:10

NVD link : CVE-2026-5443

Mitre link : CVE-2026-5443

CVE.ORG link : CVE-2026-5443

JSON object : View

Products Affected

orthanc-server

orthanc

CWE

CWE-787

Out-of-bounds Write

{"id": "CVE-2026-5443", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5443", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-04-14T15:10:56.990073Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cret@cert.org", "affectedData": [{"vendor": "Orthanc", "product": "DICOM Server", "versions": [{"status": "affected", "version": "0", "versionType": "custom", "lessThanOrEqual": "1.12.10"}]}]}], "published": "2026-04-09T15:16:16.653", "references": [{"url": "https://kb.cert.org/vuls/id/536588", "tags": ["Third Party Advisory", "VDB Entry"], "source": "cret@cert.org"}, {"url": "https://www.machinespirits.de/", "tags": ["Not Applicable"], "source": "cret@cert.org"}, {"url": "https://www.orthanc-server.com/", "tags": ["Product"], "source": "cret@cert.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "A heap buffer overflow vulnerability exists during the decoding of `PALETTE COLOR` DICOM images. Pixel length validation uses 32-bit multiplication for width and height calculations. If these values overflow, the validation check incorrectly succeeds, allowing the decoder to read and write to memory beyond allocated buffers."}, {"lang": "es", "value": "Existe una vulnerabilidad de desbordamiento de b\u00fafer en el heap durante la decodificaci\u00f3n de im\u00e1genes DICOM \u2019PALETTE COLOR\u2019. La validaci\u00f3n de la longitud de p\u00edxeles utiliza multiplicaci\u00f3n de 32 bits para los c\u00e1lculos de ancho y alto. Si estos valores se desbordan, la comprobaci\u00f3n de validaci\u00f3n tiene \u00e9xito de forma incorrecta, lo que permite al decodificador leer y escribir en la memoria m\u00e1s all\u00e1 de los b\u00faferes asignados."}], "lastModified": "2026-10-26T21:10:00.170", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:orthanc-server:orthanc:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A259075D-8B77-4B04-BC42-3E5ABE9DFE1F", "versionEndExcluding": "1.12.11"}], "operator": "OR"}]}], "sourceIdentifier": "cret@cert.org"}