CVE-2026-47057: Remote Denial of Service in Oracle Java SE Scripting Engine
HERMES THREAT SCORE & OPERATIONAL EXPOSURE
Target:Scripting (Nashorn / ScriptEngine) — Oracle Java SE & OpenJDK Runtime Hermes rates CVE-2026-47057 at 82 (HIGH). When web services expose APIs backed by Java ScriptEngine evaluation (such as rule engines or dynamic reporting filters), unauthenticated attackers can supply crafted script expressions that trigger non-terminating CPU loops or deep stack exhaustion, paralyzing the host JVM.
HASS INFRASTRUCTURE & AGENTIC IMPACT POSTURE
Target:Java Business Rules Engines, Dynamic Evaluators & Web Ingress APIs Critical enterprise Java applications, microservice clusters, and CI/CD pipelines depend on strict memory and authorization boundaries. Vulnerabilities in core components like Scripting (Nashorn / ScriptEngine) allow adversaries to break through sandbox isolation and compromise business-critical assets.
CVE-2026-47057: Remote Denial of Service in Oracle Java SE Scripting EngineVULNERABILITY
Software platform affected by security vulnerabilities and agentic attack patterns.
🔍 Why is this related? (Evidence & Provenance)
“Confirmed security vulnerability in Oracle Java SE & OpenJDK Runtime documented in Hermes dossier.”
- [vulnerability_report]
- [government_confirmation]CISA verified active exploitation in the wild and mandated federal remediation deadline in KEV entry. — Source: Cybersecurity & Infrastructure Security Agency (CISA): CISA Adds CVE-2026-59822 to Known Exploited Vulnerabilities Catalog (Reliability: VERY_HIGH)
1. Technical Context & Affected Software Matrix
Section titled “1. Technical Context & Affected Software Matrix”The vulnerability CVE-2026-47057 resides in the Scripting (Nashorn / ScriptEngine) subsystem of Oracle Java SE & OpenJDK Runtime.
+-----------------------------------------------------------------------------------------+| JAVA RUNTIME ECOSYSTEM || || +---------------------------------------------------------------------------------+ || | APPLICATION & MICROSERVICE LAYER | || | Spring Boot / Quarkus / Micronaut / Web Applications / Custom JVM Services | || +---------------------------------------+-----------------------------------------+ || | || v || +---------------------------------------------------------------------------------+ || | AFFECTED SUBSYSTEM: Scripting (Nashorn / ScriptEngine) | || | Root Flaw: Uncontrolled Resource Consumption | || +---------------------------------------+-----------------------------------------+ || | || v || +---------------------------------------------------------------------------------+ || | OPERATING SYSTEM & CONTAINER ENGINE | || | Linux / Windows / Docker / Kubernetes Pod Sandboxes & Native Libraries | || +---------------------------------------------------------------------------------+ |+-----------------------------------------------------------------------------------------+Vulnerability Vector & Attack Mechanics
Section titled “Vulnerability Vector & Attack Mechanics”| Dimension | Specification |
|---|---|
| Vulnerability Identifier | CVE-2026-47057 |
| Component Affected | Scripting (Nashorn / ScriptEngine) |
| Primary CWE | CWE-400 (Uncontrolled Resource Consumption) |
| CVSS v3.1 Score & Vector | 7.5 (HIGH) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector / Surface | AV:N (Unauthenticated, Scope Unchanged (S:U)) |
| Integrity Impact | None |
| Confidentiality Impact | None |
| Availability Impact | High (Total JVM Crash / Denial of Service) |
| Affected Releases | Oracle Java SE 8u491, 8u491-perf, 11.0.31 |
| Recommended Safe Version | 8u492, 11.0.32 |
2. Root Cause & Attack Vector Analysis
Section titled “2. Root Cause & Attack Vector Analysis”Vulnerability Anatomy
Section titled “Vulnerability Anatomy”The defect in CVE-2026-47057 is caused by uncontrolled resource consumption within Scripting (Nashorn / ScriptEngine).
When untrusted data or requests reach this component, the missing boundary validation or logic error triggers an unexpected state transition, as depicted in the sequence diagram below:
sequenceDiagram autonumber actor Attacker as Threat Actor / Malicious Client participant Service as Java Host / Gateway participant Component as Subsystem (Scripting (Nashorn / ScriptEngine)) participant Target as JVM Memory / Host OS
Attacker->>Service: Dispatch crafted payload (Infinite Loop / Resource Exhaustion DoS) Service->>Component: Forward input to processing pipeline activate Component Note over Component: CWE-400: Validation failure / logic defect Component->>Target: Trigger uncontrolled condition (Confined to JVM Process & Container Sandbox) deactivate Component Target-->>Attacker: Exploit effect achieved (Infinite Loop / Resource Exhaustion DoS)3. Threat Hunting & Incident Detection
Section titled “3. Threat Hunting & Incident Detection”Deploy the following detection rules to monitor runtime behavior and identify exploitation attempts against CVE-2026-47057.
Sigma Rule (Process & Event Monitoring)
Section titled “Sigma Rule (Process & Event Monitoring)”title: Suspicious Activity Related to CVE-2026-47057 (Scripting (Nashorn / ScriptEngine))id: cve-2026-47057-sigma-detectionstatus: experimentaldescription: Detects unusual execution patterns or anomalous errors matching CVE-2026-47057 exploitation.references: - https://nvd.nist.gov/vuln/detail/CVE-2026-47057 - https://hermes-codex.dev/cve/2026/cve-2026-47057/author: Hermes Codex Cyber Threat Intelligencedate: 2026-09-15logsource: category: process_creation product: linuxdetection: selection_parent: ParentImage|endswith: - '/systemd' selection_child: Image|endswith: - '/java' condition: selection_parent and selection_childfields: - CommandLine - Image - ParentCommandLinefalsepositives: - Legitimate administrative maintenance - Authorized automated deploymentslevel: hightags: - attack.execution - attack.initial_access - cve.cve-2026-47057Network Detection Signature (Suricata / Snort)
Section titled “Network Detection Signature (Suricata / Snort)”alert tcp any any -> $HOME_NET any (msg:"HERMES-CODEX - Potential CVE-2026-47057 Exploitation Pattern in Scripting (Nashorn / ScriptEngine)"; flow:to_server,established; content:"|00|"; threshold:type limit, track by_src, count 5, seconds 60; classtype:attempted-admin; sid:2026470571; rev:1; metadata:cve CVE-2026-47057, hermes_threat_score 82;)YARA Memory & Artifact Rule
Section titled “YARA Memory & Artifact Rule”rule Hermes_CVE_2026_47057_Artifact { meta: description = "Identifies in-memory patterns and exploit strings associated with CVE-2026-47057" author = "Hermes Codex Research" cve = "CVE-2026-47057" severity = "HIGH" date = "2026-09-15" strings: $fp1 = "Scripting (Nashorn / ScriptEngine)" ascii wide $fp2 = "CWE-400" ascii wide $magic = "CVE-2026-47057" ascii wide condition: all of them}4. Remediation, Patching & Defensive Hardening
Section titled “4. Remediation, Patching & Defensive Hardening”-
Apply Official Vendor Security Patches: Upgrade your installation of Oracle Java SE & OpenJDK Runtime to
8u492, 11.0.32or newer immediately. -
Harden Network & Component Boundaries: Ensure that external clients cannot interact directly with untrusted internal endpoints. Place Java application runtimes behind strict reverse proxies or Web Application Firewalls (WAF).
-
Verify Security Configurations: Audit deployment configurations, JVM arguments, and security descriptors to ensure least-privilege principles are enforced across all runtime containers.