How severe is CVE-2026-3813?

CVE-2026-3813 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-3813 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3813?

CVE-2026-3813 affects Opencc Jflow. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3813?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3813 have an EU (EUVD) identifier?

Yes. CVE-2026-3813 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10316.

When was CVE-2026-3813 published?

CVE-2026-3813 was published on 2026-03-09 and last updated on 2026-06-17.

CVE-2026-3813

CVE-2026-3813 is a medium-severity vulnerability in Opencc Jflow with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
CVSS v4: 2.1
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10316
Weakness: CWE-77
Affected product: Opencc Jflow
Published: 2026-03-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-3813?: 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.
How severe is CVE-2026-3813?: CVE-2026-3813 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-3813 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3813?: CVE-2026-3813 affects Opencc Jflow. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3813?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3813 have an EU (EUVD) identifier?: Yes. CVE-2026-3813 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10316.
When was CVE-2026-3813 published?: CVE-2026-3813 was published on 2026-03-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opencc:jflow:-:*:*:*:*:*:*:*

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