What is CVE-2026-87020?

CVE-2026-87020 is a high-severity vulnerability in Orthanc Dicom Server, classified under Integer Overflow or Wraparound. CVSS score: 8.1/10. Published 2026-09-11.

How severe is CVE-2026-87020?

High severity. CVSS v3 base score is 8.1 out of 10.

Integer overflow in Orthanc Dicom Server

CVE-2026-87020

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.

Vulnerability class: Integer Overflow

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Orthanc Dicom Server

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov

Frequently asked questions

What is CVE-2026-87020?: CVE-2026-87020 is a high-severity vulnerability in Orthanc Dicom Server, classified under Integer Overflow or Wraparound. CVSS score: 8.1/10. Published 2026-09-11.
How severe is CVE-2026-87020?: High severity. CVSS v3 base score is 8.1 out of 10.