CVE-2026-5444: A heap buffer overflow vulnerability exists in the PAM image parsing logic

Q: How do I fix CVE-2026-5444?

orthanc: upgrade to 1.12.11. Exact commands for each OS are on this page.

Q: Is CVE-2026-5444 being exploited?

CVE-2026-5444 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-5444 affect?

CVE-2026-5444 affects orthanc. Severity is high (CVSS 7.1). A heap buffer overflow vulnerability exists in the PAM image parsing logic. When Orthanc processes a crafted PAM image embedded in a DICOM file, image dimensions are multiplied using 32-bit unsigned arithmetic. Specially chosen values can c

Routine

HIGH 7.1UPGRADE

CVE-2026-5444 is a high-severity flaw (CVSS 7.1) affecting orthanc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A heap buffer overflow vulnerability exists in the PAM image parsing logic. When Orthanc processes a crafted PAM image embedded in a DICOM file, image dimensions are multiplied using 32-bit unsigned arithmetic. Specially chosen values can cause an integer overflow during buffer size calculation, resulting in the allocation of a small buffer followed by a much larger write operation during pixel processing.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 95%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-04-09
Last modified	2026-10-26

Publisher (CNA): CERT/CC · Vendor: orthanc-server

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-09 15:16 UTCPublished CVE record published
2026-10-26 00:10 UTCUpdated Record last modified

orthanc-server orthanc UPGRADE

Affected: < 1.12.11

Fixed in: 1.12.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy orthanc || rpm -q orthanc || orthanc --version

2. UPGRADE to 1.12.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade orthanc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade orthanc

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-5444?

orthanc: upgrade to 1.12.11. Exact commands for each OS are on this page.

Is CVE-2026-5444 being exploited?

CVE-2026-5444 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-5444 affect?

CVE-2026-5444 affects orthanc. Severity is high (CVSS 7.1). A heap buffer overflow vulnerability exists in the PAM image parsing logic. When Orthanc processes a crafted PAM image embedded in a DICOM file, image dimensions are multiplied using 32-bit unsigned arithmetic. Specially chosen values can c

How urgent is CVE-2026-5444?

Priority 26/100. High severity

Related CVEs

CVE-2026-5438 HIGH 7.5 UPGRADE A gzip decompression bomb vulnerability exists when Orthanc processes HTTP request with `Content-Encoding: gzi

References

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