What is CVE-2023-39685?

CVE-2023-39685 is a high-severity vulnerability in Hjson, classified under Code Injection. CVSS score: 7.5/10. Published 2023-09-01.

How severe is CVE-2023-39685?

High severity. CVSS v3 base score is 7.5 out of 10.

RCE in Hjson

CVE-2023-39685

An issue in hjson-java up to v3.0.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted JSON string.

Vulnerability class: RCE (Remote Code Execution)

Published 2023-09-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.1th percentile), scored 2026-10-08.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Hjson

Weakness classification (CWE)

CWE-94 — Code Injection

References

github.com/hjson/hjson-java/issues/27 (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2023-39685?: CVE-2023-39685 is a high-severity vulnerability in Hjson, classified under Code Injection. CVSS score: 7.5/10. Published 2023-09-01.
How severe is CVE-2023-39685?: High severity. CVSS v3 base score is 7.5 out of 10.