CVE-2026-40920Network attack vector

Unauthenticated privilege escalation via URL parameter

Published Aug 10, 2026 · Updated Aug 10, 2026

Privilege escalation in Apache Ranger 2.8.0 and earlier allows remote attackers to gain elevated access via a crafted URL parameter. Apache has disclosed only that URL-parameter input is improperly validated; it has not identified the affected endpoint, parameter, or privilege transition. Network access is sufficient and no authentication or user interaction is required, but the exact privileges gained remain undisclosed.

CVSS severity9.8
Critical
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Apache Ranger 2.8.0 and earlier allows remote attackers to gain elevated access via a crafted URL parameter. Apache has disclosed only that URL-parameter input is improperly validated; it has not identified the affected endpoint, parameter, or privilege transition. Network access is sufficient and no authentication or user interaction is required, but the exact privileges gained remain undisclosed.

The record

CVE
CVE-2026-40920
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Apache Software Foundation
Product
Apache Ranger
Classifications
CWE-20, CWE-287, CWE-269, T1068
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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-287Improper Authentication
CWE-269Improper Privilege Management
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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