CVE-2026-87020 Orthanc DICOM Server Integer Overflow or Wraparound
An integer overflow in Orthanc DICOM Server allows heap out-of-bounds writes via crafted PNG files, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-87020?
CVE-2026-87020 is a high-severity vulnerability in Orthanc DICOM Server, published on 11 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-190
Which versions are affected by CVE-2026-87020?
How do I fix CVE-2026-87020?
No fix has been published for CVE-2026-87020 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-87020 being exploited?
There is no known exploitation of CVE-2026-87020 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-87020, GHSA-x3f6-h73j-r3cw, UBUNTU-CVE-2026-87020.