Vulnerability · Published Sep 11, 2026 · Assigned by icscert
CVE-2026-87020Orthanc DICOM Server Integer Overflow or Wraparound
High 8.1
In plain English
A high-severity integer overflow in DICOM Server from Orthanc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.6%top 53.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | orthanc | no fix listed | DEBIAN-CVE-2026-87020 |
| Debian:13 | orthanc | no fix listed | DEBIAN-CVE-2026-87020 |
| Debian:14 | orthanc | no fix listed | DEBIAN-CVE-2026-87020 |
| Ubuntu:22.04:LTS | orthanc | no fix listed | UBUNTU-CVE-2026-87020 |
| Ubuntu:24.04:LTS | orthanc | no fix listed | UBUNTU-CVE-2026-87020 |
| Ubuntu:26.04:LTS | orthanc | no fix listed | UBUNTU-CVE-2026-87020 |
| Ubuntu:26.10 | orthanc | no fix listed | UBUNTU-CVE-2026-87020 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Orthanc | DICOM Server | 0 – before 1.13.0 |
Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H