CVE-2026-87020

Orthanc DICOM Server Integer Overflow or Wraparound

State: Published
Severity: 7.2 High
Published: Sep 11, 2026
Updated: Sep 11, 2026
Reserved: Sep 8, 2026

Description

An integer overflow in a specified pitch and buffer-size computation leads to a heap out-of-bounds write when Orthanc DICOM Server decodes an attacker-supplied PNG.

Scores

CVSS	Score	Vector	Source
4.0	7.2 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N	icscert
3.1	8.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H	icscert

Weaknesses

CWE-190

Affected Products

Product	Versions
DICOM ServerOrthanc	before 1.13.0Affected 1.13.0Not affected

References

https://orthanc.uclouvain.be/downloads/index.html
https://www.cisa.gov/news-events/ics-medical-advisories/icsma-26-253-02
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsma-26-253-02.json

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