CVE-2026-3813 opencc JFlow WF_CCForm.java Calculate injection
Remote attackers can execute arbitrary code via injection in the Calculate function of JFlow's WF_CCForm.java, requiring immediate attention due to public exploits.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3813?
CVE-2026-3813 is a medium-severity code injection vulnerability in opencc JFlow, published on 9 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was identified in opencc JFlow up to 5badc00db382d7cb82dad231e6a866b18e0addfe. Affected by this vulnerability is the function Calculate of the file src/main/java/bp/wf/httphandler/WF_CCForm.java. Such manipulation leads to injection. The attack may be performed from remote. The exploit is publicly available and might be used. This product utilizes a rolling release system for continuous delivery, and as such, version information for affected or updated releases is not disclosed. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-3813?
It affects 1 product.
Products include Opencc Jflow.
How do I fix CVE-2026-3813?
No fix has been published for CVE-2026-3813 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-3813 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3813 exists.
Sources
Also known as GHSA-f3jc-x246-gfjr.