J4Care dcm4chee-arc-light: Inefficient algorithmic complexity in multipart parsing
Summary
The MultipartInputStream component of J4Care dcm4chee-arc-light, a DICOM medical imaging archive, performs inefficient boundary matching and unnecessary buffer copying. An unauthenticated remote attacker can send crafted multipart input to force excessive processing, which can make the archive unresponsive (denial of service). Confidentiality and integrity are not affected.
Affected
- dcm4chee-arc-light 5.35.1 (per CISA advisory ICSMA-26-288-02)
- Older versions: Unknown.
Fixed in
- dcm4chee-arc-light 5.35.2 or later (per J4Care via CISA)
Workaround
- Unknown. No vendor-documented interim mitigation is available.
- If an upgrade cannot be made quickly, restrict network access to the DICOM and HTTP interfaces.
Exploitation
- No public proof-of-concept exploit found. VulDB states no exploit is available.
- No reports of exploitation in the sources reviewed. CISA SSVC: Exploitation none, Automatable yes.
- Check the CISA KEV catalog periodically.
Our recommendation
- Identify all dcm4chee-arc-light instances and upgrade any version 5.35.1 or earlier to 5.35.2 or later.
- Confirm the version of older installations with the vendor.
- Do not expose the DICOM or HTTP interfaces to the internet; restrict access with firewalls and segmentation.
- Review the DICOM AE whitelist configuration, since the same advisory lists related configuration exposure.
- Monitor for resource exhaustion and service unavailability.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- CISA ICS Medical Advisory ICSMA-26-288-02 www.cisa.gov
- CISA CSAF file ICSMA-26-288-02 github.com
- dcm4chee-arc-light release 5.35.2 github.com
- VulDB entry 421296 vuldb.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 02:21.
Original description (NVD)
MultipartInputStream performs inefficient boundary matching and unnecessary buffer copying. Crafted multipart input can force excessive boundary comparisons and repeated copying.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.