CVE-2026-5442 json
Heap Buffer Overflow in DICOM Image Decoder via VR UL Dimensions
published 7mo ago modified 16d ago also EUVD-2026-20920
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value Representation (VR) Unsigned Long (UL), instead of the expected VR Unsigned Short (US), which allows extremely large dimensions to be processed. This causes an integer overflow during frame size calculation and results in out-of-bounds memory access during image decoding.
Patch / fix
- orthanc-server orthanc 1.12.11
- orthanc Debian 14 1.12.10+dfsg-4
debian advisories DEBIAN-CVE-2026-5442
Is CVE-2026-5442 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 6mo ago
Exploit prediction
0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Orthanc DICOM Server
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
orthanc-server.com
/
product
-
machinespirits.de
/
not-applicable
-
kb.cert.org
/vuls/id/536588
third-party-advisory, vdb-entry
Sources
- CVE List CVE-2026-5442
- NVD CVE-2026-5442
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.