Cloudanix VulnDB

CVE-2026-114820

Critical · 9.1

CVSS

9.1

EPSS

0.3%

Published

Oct 24, 2026

CISA due date

—

Cloudanix analysis

Schedule a fix SSVC: Track

A serious flaw in Java software lets remote attackers change or read important information without logging in.

Exploitation
Remote Unauthenticated
Attacker needs
None
Complexity
Low
Impact
Data Tampering
Component
Library
Class
Cryptographic Weakness
Remediation
Upgrade
Effort
Medium
Patch risk
Low

What it actually does

A flaw in the JSSE component permits unauthenticated network attackers to bypass cryptographic protections, enabling arbitrary modification and full read access to sensitive data handled by Java applications.

Why it matters to the business

Organizations face risks of data tampering and unauthorized disclosure in Java-based systems, potentially leading to compliance violations and loss of trust, requiring prompt remediation given the recent disclosure and high severity.

How an attack unfolds

An attacker connects to a vulnerable Java application over network protocols and crafts requests that exploit the JSSE weakness to gain unauthorized data access and modification rights without authentication or user interaction.

How to fix it

Upgrade affected Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition installations to the latest patched versions as released by Oracle.

How to confirm the fix worked

Verify Java runtime versions against Oracle security advisories after applying updates and confirm that JSSE-related cryptographic checks enforce expected protections.

Typical attack path

  1. Identify exposed Java services using JSSE
  2. Send specially crafted network requests via supported protocols such as TLS
  3. Exploit the cryptographic weakness to bypass protections
  4. Modify or access critical data

How to detect it

Review network and application logs for unusual unauthenticated access attempts targeting Java services and inspect for patterns consistent with cryptographic bypass attempts.

What your security team should do

  • Apply available Oracle patches to all affected Java deployments immediately
  • Restrict network exposure of Java services where possible
  • Monitor for any public exploit development given the high CVSS score

The record

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JSSE). Supported versions that are affected are Oracle Java SE: 8u511-b32, 8u511-perf-b32, 11.0.33.0.2, 17.0.21.0.2, 21.0.13.0.2, 25.0.5.0.2, 27.0.1.0.2; Oracle GraalVM for JDK: 17.0.21.0.2 and 21.0.13.0.2; Oracle GraalVM Enterprise Edition: 21.3.20.0.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as unauthorized access to critical data or complete access to all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).

Affected packages

Ecosystem Package Introduced Fixed

Related vulnerabilities