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 中存在一个“LDAP 查询中特殊元素未正确中和（即 LDAP 注入）”的漏洞。 持有 LDAP 目录中某个条目有效凭据的调用方，可以通过 APISIX 身份验证，并映射为另一个条目的消费者，而该条目本应被该插件配置的访问控制范围排除在外。 此问题影响 Apache APISIX 的 2.11.0 到 3.17.0 版本。 建议用户升级到 3.18.0 版本，该版本已修复此问题。
Possible ATT&CK Techniques 2 AI
T1531 · Account Access Removal T1589 · Gather Victim Identity Information
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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
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
| # | POC Description | Source Link | Shenlong Link |
|---|
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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 |
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V. Comments for CVE-2026-75020
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