CVE-2026-22022Network attack vector

Unauthorized API access via null permission resolution

Published Jan 21, 2026 · Updated Jan 21, 2026

Authorization bypass in Apache Solr 5.3.0 through 9.10.0 allows remote attackers to access protected APIs via crafted HTTP requests. Unexpected HTTP methods or path deviations make affected handlers' getPermissionName logic return null, causing RuleBasedAuthorizationPlugin to skip the predefined permission. Exposure requires multiple configured roles, a listed predefined permission without an all rule, and unfiltered network access; reachable APIs can disclose metrics, configuration, schema, or security data and permit configured edits.

CVSS severity8.2
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Apache Solr 5.3.0 through 9.10.0 allows remote attackers to access protected APIs via crafted HTTP requests. Unexpected HTTP methods or path deviations make affected handlers' getPermissionName logic return null, causing RuleBasedAuthorizationPlugin to skip the predefined permission. Exposure requires multiple configured roles, a listed predefined permission without an all rule, and unfiltered network access; reachable APIs can disclose metrics, configuration, schema, or security data and permit configured edits.

The record

CVE
CVE-2026-22022
Published
Jan 21, 2026
Updated
Jan 21, 2026
Vendor
The Apache Software Foundation
Product
Apache Solr
Classifications
CWE-285, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 21, 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=5.3 <=9.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Solrversion=5.3 <=9.10.0

Published CVSS scores

8.2CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

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-285Improper Authorization
T1190Exploit Public-Facing Application

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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