CVE-2026-55799Network attack vectorHinoki check available

Remote code execution via unrestricted GraalJS host access

Published Aug 10, 2026 · Updated Aug 10, 2026

Code injection in GraalScriptEngineCreator in Apache Ranger 2.8.0 and earlier allows remote attackers to execute arbitrary code. The policy-condition evaluator creates a GraalJS engine with broad Java host access and Nashorn compatibility instead of restricting scripts to Ranger's intended API. The flaw is reached when a malicious policy condition expression is evaluated, and resulting code runs with the hosting Ranger component's privileges.

CVSS severity9.8
Critical
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Code injection in GraalScriptEngineCreator in Apache Ranger 2.8.0 and earlier allows remote attackers to execute arbitrary code. The policy-condition evaluator creates a GraalJS engine with broad Java host access and Nashorn compatibility instead of restricting scripts to Ranger's intended API. The flaw is reached when a malicious policy condition expression is evaluated, and resulting code runs with the hosting Ranger component's privileges.

The record

CVE
CVE-2026-55799
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Apache Software Foundation
Product
Apache Ranger
Classifications
CWE-94, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Rangerversion=0 <=2.8.0

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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