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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.

Apache Impala是美国Apache基金会的一款服务端软件产品。 Apache Impala 4.0.0版本至4.5.1版本存在加密问题漏洞，该漏洞源于SAML2认证的hs2-http接口最后步骤未验证Bearer令牌签名，可能导致攻击者更改用户名并冒充其他用户。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.46% · P39

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Impala 4.0.0≤ 4.5.1 affected
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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
Vulnerability Title
Apache Impala 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Impala是美国Apache基金会的一款服务端软件产品。 Apache Impala 4.0.0版本至4.5.1版本存在加密问题漏洞，该漏洞源于SAML2认证的hs2-http接口最后步骤未验证Bearer令牌签名，可能导致攻击者更改用户名并冒充其他用户。
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)

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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Mailing List Discussions for CVE-2026-56207 (1)

Same Patch Batch · Apache Software Foundation · 2026-09-09 · 9 CVEs total

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IV. Related Vulnerabilities

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