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CVE-2026-101021— J4Care dcm4che Inefficient Algorithmic Complexity

Quick assessment

Affected
J4Care dcm4chee-arc-light
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MultipartInputStream 执行低效的边界匹配，并产生不必要的缓冲区复制。精心构造的 multipart 输入可强制进行过多的边界比较和重复的缓冲区复制。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1499.003 · Application Exhaustion Flood

Affected Version Matrix 2

VendorProduct Version RangeStatus
J4Care dcm4chee-arc-light 5.35.1 affected
5.35.2 unaffected
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I. Basic Information for CVE-2026-101021

Vulnerability Information
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Vulnerability Title
J4Care dcm4che Inefficient Algorithmic Complexity
Source: CVE Program / CVE List V5
Vulnerability Description
MultipartInputStream performs inefficient boundary matching and unnecessary buffer copying. Crafted multipart input can force excessive boundary comparisons and repeated copying.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
J4Care dcm4chee-arc-light 5.35.1 -

II. Public POCs for CVE-2026-101021

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-101021

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Vendor Advisories for CVE-2026-101021 (2)

Same Patch Batch · J4Care · 2026-10-16 · 6 CVEs total

CVE-2026-97851 9.1 CRITICAL J4Care dcm4che Missing Authorization
CVE-2026-105279 9.1 CRITICAL J4Care dcm4che Missing Authentication for Critical Function
CVE-2026-105273 7.5 HIGH J4Care dcm4che Loop with Unreachable Exit Condition
CVE-2026-107621 7.5 HIGH J4Care dcm4che Loop with Unreachable Exit Condition
CVE-2026-105667 7.5 HIGH J4Care dcm4che Missing Authentication for Critical Function

IV. Related Vulnerabilities

Same product: dcm4chee-arc-light
Same vendor: J4Care
Same weakness: CWE-407

V. Comments for CVE-2026-101021

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