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CVE-2026-87020

Orthanc DICOM Server Integer Overflow or Wraparound

7.2 High

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
High

Exploit likelihood

0.56%Unchanged since Sep 12, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.2

Orthanc DICOM Server Integer Overflow or Wraparound

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.

Record
CVE-2026-87020
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness
CWE-190
Updated
2026-11-02
EUVDEUVD-2026-76113 7.2

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.

Record
EUVD-2026-76113
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-x3f6-h73j-r3cw 7.2

An integer overflow in a specified pitch and buffer-size computation leads to a heap out-of...

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.

Record
GHSA-x3f6-h73j-r3cw
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness
CWE-190
Updated
2026-11-02
NVD 7.2

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.

Record
CVE-2026-87020
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness
CWE-190
Updated
2026-11-02
OSVDEBIAN-CVE-2026-87020 7.2

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.

Record
DEBIAN-CVE-2026-87020
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
OSVUBUNTU-CVE-2026-87020 7.2

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.

Record
UBUNTU-CVE-2026-87020
CVSS 4.0
7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
8.1 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
orthanc
Debian:12
 All versions, plus listed versions
1.10.1+dfsg-21.10.1+dfsg-2+deb12u11.12.1+dfsg-11.12.1+dfsg-21.12.1+dfsg-3
Show 31 moreShow less
1.12.1+dfsg-41.12.10+dfsg-11.12.10+dfsg-21.12.10+dfsg-31.12.10+dfsg-41.12.10+dfsg-51.12.11+dfsg-11.12.11+dfsg-21.12.11+dfsg-31.12.11+dfsg-41.12.11+dfsg-51.12.11+dfsg-61.12.11+dfsg-71.12.11+dfsg-81.12.2+dfsg-11.12.3+dfsg-11.12.3+dfsg-21.12.4+dfsg-11.12.4+dfsg-21.12.4+dfsg-31.12.4+dfsg-41.12.5+dfsg-11.12.5+dfsg-21.12.6+dfsg-11.12.7+dfsg-11.12.7+dfsg-21.12.7+dfsg-31.12.7+dfsg-41.12.9+dfsg-11.12.9+dfsg-21.13.0+dfsg-1
 None known
orthanc
Debian:13
 All versions, plus listed versions
1.12.10+dfsg-11.12.10+dfsg-21.12.10+dfsg-31.12.10+dfsg-41.12.10+dfsg-5
Show 12 moreShow less
1.12.11+dfsg-11.12.11+dfsg-21.12.11+dfsg-31.12.11+dfsg-41.12.11+dfsg-51.12.11+dfsg-61.12.11+dfsg-71.12.11+dfsg-81.12.7+dfsg-41.12.9+dfsg-11.12.9+dfsg-21.13.0+dfsg-1
 None known
orthanc
Debian:14
 All versions, plus listed versions
1.12.10+dfsg-11.12.10+dfsg-21.12.10+dfsg-31.12.10+dfsg-41.12.10+dfsg-5
Show 12 moreShow less
1.12.11+dfsg-11.12.11+dfsg-21.12.11+dfsg-31.12.11+dfsg-41.12.11+dfsg-51.12.11+dfsg-61.12.11+dfsg-71.12.11+dfsg-81.12.7+dfsg-41.12.9+dfsg-11.12.9+dfsg-21.13.0+dfsg-1
 None known
orthanc
Ubuntu:16.04:LTS
 All versions, plus listed versions
0.9.4+dfsg-10.9.4+dfsg-20.9.5+dfsg-11.0.0+dfsg-11.0.0+dfsg-1build1
 None known
orthanc
Ubuntu:18.04:LTS
 All versions, plus listed versions
1.3.0+dfsg-1build11.3.0+dfsg-1build21.3.1+dfsg-11.3.1+dfsg-1build11.3.1+dfsg-1build2
 None known
orthanc
Ubuntu:20.04:LTS
 All versions, plus listed versions
1.5.7+dfsg-21.5.8+dfsg-21.5.8+dfsg-2ubuntu21.5.8+dfsg-2ubuntu31.5.8+dfsg-2ubuntu41.5.8+dfsg-2ubuntu51.5.8+dfsg-2ubuntu6
 None known
orthanc
Ubuntu:22.04:LTS
 All versions, plus listed versions
1.9.2+really1.9.1+dfsg-11.9.7+dfsg-3ubuntu11.9.7+dfsg-3ubuntu21.9.7+dfsg-41.9.7+dfsg-51.9.7+dfsg-61.10.0+dfsg-1
 None known
orthanc
Ubuntu:24.04:LTS
 All versions, plus listed versions
1.12.1+dfsg-31.12.1+dfsg-41.12.1+dfsg-4build11.12.2+dfsg-11.12.2+dfsg-1build31.12.2+dfsg-1build4
 None known
orthanc
Ubuntu:26.10
 All versions, plus listed versions
1.12.10+dfsg-21.12.11+dfsg-81.12.11+dfsg-8build1
 None known
orthanc
Ubuntu:26.04:LTS
 All versions, plus listed versions
1.12.7+dfsg-4build21.12.9+dfsg-21.12.10+dfsg-11.12.10+dfsg-1build11.12.10+dfsg-2
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-87020 is a high vulnerability (CVSS 7.2) in Orthanc Dicom Server, published September 11, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.56%, the 46th percentile. No source names a fixed version.

References

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