CVE-2026-87020 Orthanc DICOM Server - Integer Overflow

Orthanc DICOM Server contains an integer overflow caused by improper pitch and buffer-size computation during PNG decoding, letting attackers cause heap out-of-bounds write, exploit requires crafted PNG input.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.56% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Integer Overflow
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Published
11 September 2026
Updated
15 October 2026
Weakness
CWE-190

Vendor fix

Update to the latest version of Orthanc DICOM Server.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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