---
id: "CVE-2026-101737"
kind: "vulnerability"
aliases: ["CVE-2026-101737"]
title: "Java SE: Compiler flaw lets remote input crash or hang Java"
severity: "medium"
cvss: 5.9
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["java", "runtime", "self-hosted", "web-services"]
not_affected_if: ["no-untrusted-input", "other-java-version"]
published_at: "2026-10-20T22:18:28+00:00"
first_seen_at: "2026-10-23T21:57:23+00:00"
updated_at: "2026-10-25T04:08:31+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-101737", "first_seen_at": "2026-10-23T21:57:23+00:00"}]
---

# Java SE: Compiler flaw lets remote input crash or hang Java

A flaw in the Compiler component of Oracle Java SE 26.0.2 can be triggered by supplying crafted data to its APIs, such as through a web service. An unauthenticated remote attacker can cause a hang or repeatable crash of the Java runtime, a denial of service with no code execution or data exposure.

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

## How to check

- Run `java -version` and check whether it reports Oracle Java SE `26.0.2`.
- Identify services that pass untrusted input to Java compiler APIs, such as web services that compile or evaluate code.

## Fix

- Move Oracle Java SE to the patched release listed in Oracle's Critical Patch Update for this CVE; the exact fixed version is unknown from the sources.

## Timeline

- 2026-10-23T21:57:23+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-101737

## From the sources

Vulnerability in Oracle Java SE (component: Compiler).   The supported version that is affected is Oracle Java SE: 26.0.2. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE.  Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Java SE. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 5.9 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).

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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_