CVE-2026-101021 J4Care dcm4che Inefficient Algorithmic Complexity
Attackers can cause denial of service in J4Care dcm4chee-arc-light by sending crafted multipart input that triggers inefficient algorithmic complexity.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-101021?
CVE-2026-101021 is a high-severity denial of service vulnerability in J4Care dcm4chee-arc-light, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
MultipartInputStream performs inefficient boundary matching and unnecessary buffer copying. Crafted multipart input can force excessive boundary comparisons and repeated copying.
Weakness: CWE-407
Which versions are affected by CVE-2026-101021?
How do I fix CVE-2026-101021?
No fix has been published for CVE-2026-101021 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-101021 being exploited?
There is no known exploitation of CVE-2026-101021 in the wild and no public exploit code.