CVE-2026-42809Network attack vector

Storage access escalation via unvalidated staged locations

Published May 4, 2026 · Updated May 4, 2026

Missing authorization in Apache Polaris before 1.4.1 allows remote authenticated users to obtain credentials for unauthorized storage locations. The staged-create path constructs delegated credentials from caller-controlled location, write.data.path, or write.metadata.path values before location and overlap checks. Table-creation permission and credential vending are required, and access is bounded by storage reachable through the catalog's configured role.

CVSS severity9.4
Critical
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Apache Polaris before 1.4.1 allows remote authenticated users to obtain credentials for unauthorized storage locations. The staged-create path constructs delegated credentials from caller-controlled location, write.data.path, or write.metadata.path values before location and overlap checks. Table-creation permission and credential vending are required, and access is bounded by storage reachable through the catalog's configured role.

The record

CVE
CVE-2026-42809
Published
May 4, 2026
Updated
May 4, 2026
Vendor
The Apache Software Foundation
Product
Apache Polaris
Classifications
CWE-20, CWE-862, T1528
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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-862Missing Authorization
T1528Steal Application Access Token

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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