CVE-2026-42810Network attack vector

Cross-table storage access via wildcard policy injection

Published May 4, 2026 · Updated May 4, 2026

Improper input validation in Apache Polaris before 1.4.1 allows remote authenticated users to access other tables through vended S3 credentials. Polaris inserts literal asterisks from namespace or table names into S3 IAM resource patterns and prefix conditions, where IAM interprets them as wildcards. The issue requires AWS S3 credential vending and table-creation permissions; resulting credentials can read, create, or delete objects under another table's prefix.

CVSS severity9.4
Critical
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Apache Polaris before 1.4.1 allows remote authenticated users to access other tables through vended S3 credentials. Polaris inserts literal asterisks from namespace or table names into S3 IAM resource patterns and prefix conditions, where IAM interprets them as wildcards. The issue requires AWS S3 credential vending and table-creation permissions; resulting credentials can read, create, or delete objects under another table's prefix.

The record

CVE
CVE-2026-42810
Published
May 4, 2026
Updated
May 4, 2026
Vendor
The Apache Software Foundation
Product
Apache Polaris
Classifications
CWE-20, CWE-116, T1485, T1530
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 4, 2026CVE publishedPublication date reported by the CVE source.
  2. May 4, 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 <1.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache Polarisversion=0 <1.4.1

Published CVSS scores

9.9Apache Software FoundationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
9.4Apache Software FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-116Improper Encoding or Escaping of Output
T1485Data Destruction
T1530Data from Cloud Storage

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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