CVE-2026-3813: A vulnerability was identified in opencc JFlow up to 5badc00db382d7cb82dad231e6a866b18e0addfe

Routine

MEDIUM 6.3MITIGATE

CVE-2026-3813 is a medium-severity flaw (CVSS 6.3) affecting jflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 f

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-74, CWE-707, CWE-77
Published	2026-03-09
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: opencc

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-09 10:16 UTCPublished CVE record published
2026-06-17 10:44 UTCUpdated Record last modified

opencc jflow MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy jflow || rpm -q jflow || jflow --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-3813?

jflow: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-3813 being exploited?

CVE-2026-3813 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-3813 affect?

CVE-2026-3813 affects jflow. Severity is medium (CVSS 6.3). 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 i

How urgent is CVE-2026-3813?

Priority 35/100. Public exploit reference

Software pages

Java vulnerabilities

Related CVEs

CVE-2024-9003 MEDIUM 4.3 DOWNGRADE A vulnerability was found in Jinan Chicheng Company JFlow 2.0.0

References

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