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CVE-2026-42809— Apache Polaris: staged table creation could vend storage credentials for unvalidated locations

Quick assessment

Affected
Apache Software Foundation Apache Polaris
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Polaris是Apache基金会的一个数据管理与查询服务组件。 Apache Polaris存在输入验证错误漏洞，该漏洞源于在阶段表创建过程中未验证或持久保留有效表位置即发放临时存储凭据，可能导致攻击者选择可访问的目标位置。

CVSS 9.9 · Critical EPSS 0.58% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Polaris < 1.4.1 affected
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I. Basic Information for CVE-2026-42809

Vulnerability Information
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Vulnerability Title
Apache Polaris: staged table creation could vend storage credentials for unvalidated locations
Source: CVE Program / CVE List V5
Vulnerability Description
Apache Polaris can issue broad temporary ("vended") storage credentials during staged table creation before the effective table location has been validated or durably reserved. Those temporary credentials are meant to limit the scope of accessible table data and metadata, but this scope limitation becomes attacker- directed because the attacker can choose a reachable target location. In the confirmed variant, if the caller supplies a custom `location` during stage create and requests credential vending, Apache Polaris uses that location to construct delegated storage credentials immediately. The stage-create path itself neither runs the normal location validation nor the overlap checks before those credentials are issued. Closely related to that, the staged-create flow also accepts `write.data.path` / `write.metadata.path` in the request properties and feeds those location overrides into the same effective table location set used for credential vending. Those fields are secondary to the main custom-`location` exploit, but they are still attacker-influenced location inputs that should be validated before any credentials are issued.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Polaris 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Polaris是Apache基金会的一个数据管理与查询服务组件。 Apache Polaris存在输入验证错误漏洞，该漏洞源于在阶段表创建过程中未验证或持久保留有效表位置即发放临时存储凭据，可能导致攻击者选择可访问的目标位置。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Polaris 0 ~ 1.4.1 -

II. Public POCs for CVE-2026-42809

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III. Intelligence Information for CVE-2026-42809

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Mailing List Discussions for CVE-2026-42809 (1)

Same Patch Batch · Apache Software Foundation · 2026-05-04 · 17 CVEs total

CVE-2026-42810 9.9 CRITICAL Apache Polaris: could broaden vended S3 credentials through wildcard-bearing namespace or
CVE-2026-42811 9.9 CRITICAL Apache Polaris: could broaden vended GCS credentials through unescaped identifier content
CVE-2026-42812 9.9 CRITICAL Apache Polaris: No protection on `write.metadata.path`
CVE-2026-40682 Apache OpenNLP: XXE via Dictionary Parsing in DictionaryEntryPersistor
CVE-2026-42027 Apache OpenNLP: Arbitrary Class Instantiation via Model Manifest in ExtensionLoader
CVE-2026-42440 Apache OpenNLP: OOM DoS via Unbounded Array Allocation in AbstractModelReader
CVE-2026-40563 Apache Atlas: Script injection allows access to unintended data
CVE-2026-29169 Apache HTTP Server: mod_dav_lock indirect lock crash
CVE-2026-23918 Apache HTTP Server: http2: double free and possible RCE on early reset
CVE-2026-33006 Apache HTTP Server: mod_auth_digest timing attack
CVE-2026-33007 Apache HTTP Server: mod_authn_socache crash
CVE-2026-33523 Apache HTTP Server: multiple modules: HTTP response splitting forwarding malicious status
CVE-2026-33857 Apache HTTP Server: Off-by-one OOB reads in AJP getter functions
CVE-2026-34032 Apache HTTP Server: mod_proxy_ajp: Heap Buffer Over-Read Due to Missing Null-Termination C
CVE-2026-34059 Apache HTTP Server: mod_proxy_ajp: Heap Over-Read and memory disclosure in ajp_parse_data
CVE-2026-24072 Apache HTTP Server: mod_rewrite elevation of privileges via ap_expr

IV. Related Vulnerabilities

Same product: Apache Polaris
Same vendor: Apache Software Foundation
Same weakness: CWE-862

V. Comments for CVE-2026-42809

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