What is CVE-2026-52439?

CVE-2026-52439 is a critical-severity vulnerability in N/a, classified under Improper Neutralization of Special Elements used in an Expression Language Statement (Expression Language Injection). CVSS score: 9.8/10. Published 2026-07-23.

How severe is CVE-2026-52439?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in N/a

CVE-2026-52439

An issue in xiandafu beetl 3.20.2 allows a remote attacker to execute arbitrary code via the type.new function and the property reflection mechanism

Vulnerability class: Log4Shell (CVE-2021-44228)

Published 2026-07-23 · last modified 2026-10-24.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (60.2th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.2% 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

Weakness classification (CWE)

CWE-917 — Improper Neutralization of Special Elements used in an Expression Language Statement (Expression Language Injection)

References

Frequently asked questions

What is CVE-2026-52439?: CVE-2026-52439 is a critical-severity vulnerability in N/a, classified under Improper Neutralization of Special Elements used in an Expression Language Statement (Expression Language Injection). CVSS score: 9.8/10. Published 2026-07-23.
How severe is CVE-2026-52439?: Critical severity. CVSS v3 base score is 9.8 out of 10.