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CVE-2026-75020— Apache APISIX: ldap-auth plugin cross-subtree identity impersonation

Quick assessment

Affected
Apache Software Foundation Apache APISIX
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 APISIX是美国Apache基金会的一款API网关。 Apache APISIX 2.11.0版本至3.17.0版本存在输入验证错误漏洞，该漏洞源于LDAP查询中特殊元素中和不当，可能导致持有有效凭据的攻击者以其他消费者身份进行身份验证，从而绕过访问限制。

CVSS 7.0 · High EPSS 0.55% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache APISIX 2.11.0≤ 3.17.0 affected
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I. Basic Information for CVE-2026-75020

Vulnerability Information
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Vulnerability Title
Apache APISIX: ldap-auth plugin cross-subtree identity impersonation
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') vulnerability in Apache APISIX. A caller who holds valid credentials for one entry in the LDAP directory can authenticate through APISIX as a consumer mapped to a different entry, one the plugin's configured scope was meant to keep out of reach. This issue affects Apache APISIX: from 2.11.0 through 3.17.0. Users are recommended to upgrade to version 3.18.0, which fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
LDAP查询中使用的特殊元素转义处理不恰当(LDAP注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache APISIX 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache APISIX是美国Apache基金会的一款API网关。 Apache APISIX 2.11.0版本至3.17.0版本存在输入验证错误漏洞，该漏洞源于LDAP查询中特殊元素中和不当，可能导致持有有效凭据的攻击者以其他消费者身份进行身份验证，从而绕过访问限制。
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 APISIX 2.11.0 ~ 3.17.0 -

II. Public POCs for CVE-2026-75020

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III. Intelligence Information for CVE-2026-75020

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Mailing List Discussions for CVE-2026-75020 (1)

Same Patch Batch · Apache Software Foundation · 2026-08-27 · 3 CVEs total

CVE-2026-75005 8.7 HIGH Apache APISIX: Unauthenticated CPU-exhaustion DoS
CVE-2026-74848 7.0 HIGH Apache APISIX: Cross-user response poisoning in serverless plugins

IV. Related Vulnerabilities

Same product: Apache APISIX
Same vendor: Apache Software Foundation
Same weakness: CWE-90

V. Comments for CVE-2026-75020

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