What is CVE-2019-13116?

CVE-2019-13116 is a critical-severity vulnerability in Mulesoft Mule Runtime, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2019-10-16.

How severe is CVE-2019-13116?

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

Is CVE-2019-13116 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Mulesoft Mule Runtime

CVE-2019-13116

The MuleSoft Mule Community Edition runtime engine before 3.8 allows remote attackers to execute arbitrary code because of Java Deserialization, related to Apache Commons Collections

Vulnerability class: Insecure Deserialization

Published 2019-10-16 · last modified 2026-06-17.

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: 0.051 (92.1th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.051 · newest: 0.051 · change: 0.000

Affected products

Mulesoft Mule Runtime

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

docs.mulesoft.com/release-notes/mule-runtime/mule-3.8.0-release-notes (Release Notes)
threat.tevora.com/mulesoft-3-8-unauthenticated-rce/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-13116?: CVE-2019-13116 is a critical-severity vulnerability in Mulesoft Mule Runtime, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2019-10-16.
How severe is CVE-2019-13116?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-13116 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.