CVE-2026-87020

HIGH 8.1

Orthanc DICOM Server Integer Overflow or Wraparound

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-190
Vendor	orthanc
Product	dicom server
Published	Sep 11, 2026
Last Updated	Sep 11, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Affected Versions

Orthanc / DICOM Server

0 < 1.13.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Andrej Tomci reported this vulnerability to CISA.