Is CVE-2026-107621 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-107621 being exploited in the wild.

How severe is CVE-2026-107621?

High severity, with a CVSS score of 7.5, published 16 October 2026.

Which products and versions are affected?

J4Care Dcm4chee-Arc-Light 5.35.1.

Is there a fix for CVE-2026-107621?

Yes: fixed in dcm4chee-arc-light 5.35.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-107621 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-107621?

Check whether you run J4Care Dcm4chee-Arc-Light at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-107621: J4Care dcm4che JPEGParser infinite loop in JPEG parsing

CVE-2026-107621 · Severity: high · CVSS 7.5 · Published 2026-10-16

J4Care dcm4che is a DICOM archive system that stores and manages medical images in healthcare facilities. A flaw in its JPEG image parser can cause the system to enter an infinite loop when processing malformed or truncated image files, leading to a denial of service that prevents legitimate access to patient data.

Technologies: J4Care Dcm4chee-Arc-Light. Vendors: J4Care.

Quick answers

Is CVE-2026-107621 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-107621 being exploited in the wild.
How severe is CVE-2026-107621?: High severity, with a CVSS score of 7.5, published 16 October 2026.
Which products and versions are affected?: J4Care Dcm4chee-Arc-Light 5.35.1.
Is there a fix for CVE-2026-107621?: Yes: fixed in dcm4chee-arc-light 5.35.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-107621 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-107621?: Check whether you run J4Care Dcm4chee-Arc-Light at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: dcm4chee-arc-light 5.35.2 or later

Technical details

CVE-2026-107621 is an infinite loop vulnerability (CWE-835) in JPEGParser that occurs when parsing specially crafted or truncated JPEG streams. The vulnerability is triggered remotely over the network without authentication or user interaction, causing the parser to hang and consume resources. A fix is available in dcm4chee-arc-light 5.35.2 or later.

Affected products

J4Care dcm4chee-arc-light 5.35.1

Timeline

2026-10-16: disclosed
2026-10-15: advisory: CISA ICS Medical Advisory ICSMA-26-288-02

References

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