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CVE-2026-56207— Apache Impala: SAML authentication bypass via forged bearer token

Quick assessment

Affected
Apache Software Foundation Apache Impala
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.

在 Impala 的 hs2-http 接口的 SAML2 认证流程的最后一步中，Bearer 令牌的签名未被验证，导致攻击者可以修改用户名并冒充其他用户。 此问题影响 Apache Impala 版本 4.0.0 及更高版本。 建议用户升级到 4.5.2 版本，该版本已修复此问题。

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I. Basic Information for CVE-2026-56207

Vulnerability Information
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Vulnerability Title
Apache Impala: SAML authentication bypass via forged bearer token
Source: CVE Program / CVE List V5
Vulnerability Description
Signature of Bearer token is not verified in last step of SAML2 authentication for Impala's hs2-http interface, allowing altering user name and acting as another user. This issue affects Apache Impala: >=4.0.0. Users are recommended to upgrade to version 4.5.2, which fixes this issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Impala 4.0.0 ~ 4.5.1 -

II. Public POCs for CVE-2026-56207

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III. Intelligence Information for CVE-2026-56207

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Other References for CVE-2026-56207 (1)

Same Patch Batch · Apache Software Foundation · 2026-09-09 · 8 CVEs total

CVE-2026-73334 Apache Parquet Hadoop: File-controlled KMS URL is forwarded to pluggable KmsClient that sk
CVE-2026-41871 Apache Nutch: Unauthenticated reflection-based job execution in Nutch Server (Nutch REST A
CVE-2026-41869 Apache Nutch: Unauthenticated forced shutdown and job interruption in Nutch Server (Nutch
CVE-2026-41870 Apache Nutch: Unauthenticated remote code execution (RCE) via JEXL injection in Nutch Serv
CVE-2026-65181 Apache Impala: RCE via External Data Source Class Loading
CVE-2026-57866 Apache Impala: Secrets Exfiltration via SSRF
CVE-2026-54048 Apache Impala: Avro Schema URL Server-Side Request Forgery

IV. Related Vulnerabilities

Same product: Apache Impala
Same vendor: Apache Software Foundation
Same weakness: CWE-347

V. Comments for CVE-2026-56207

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