---
id: "CVE-2013-0431"
kind: "vulnerability"
aliases: ["CVE-2013-0431"]
title: "Oracle Java Runtime Environment (JRE): Oracle JRE Sandbox Bypass Vulnerability"
severity: "high"
cvss: 5.0
epss: 0.9015
exploited: true
status: "open"
category: "runtime"
products: [{"name": "Oracle Java Runtime Environment (JRE)", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["browsers", "desktop", "exploited", "java", "oracle-jre", "ransomware", "runtime"]
not_affected_if: ["java-disabled-in-browser", "no-java-installed"]
published_at: "2013-01-31T14:55:01+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2013-0431", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2013-0431", "first_seen_at": "2026-10-23T19:13:45+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2013-0431", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Oracle Java Runtime Environment (JRE): Oracle JRE Sandbox Bypass Vulnerability

Oracle Java Runtime Environment has an unspecified flaw that lets a remote attacker bypass the Java security sandbox. CISA lists it as actively exploited in the wild, and an EPSS score of 0.901 means exploitation is very likely.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Oracle Java Runtime Environment (JRE) affected ? fixed ?

## Fix

Apply the Oracle Java update per vendor instructions, as CISA requires. Specific fixed version: unknown

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2013-0431
- 2026-10-23T19:13:45+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2013-0431
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2013-0431

## From the sources

Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 through Update 11, and OpenJDK 7, allows user-assisted remote attackers to bypass the Java security sandbox via unspecified vectors related to JMX, aka "Issue 52," a different vulnerability than CVE-2013-1490.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_