CVE-2026-103877— Apache Directory LDAP API: Unsafe loading of Java code from LDAP schema elements
Quick assessment
Affected
Apache Software Foundation Apache Directory LDAP API
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 Directory LDAP API 中存在不受信数据的反序列化漏洞。 恶意或已被攻陷的 LDAP 服务器（或在 TLS 之前的中间人攻击场景下）可以在响应客户端的 loadSchema() 子模式搜索时，返回一个包含已序列化 Java 类的模式对象，从而可能导致远程代码执行（RCE）。 该漏洞影响 Apache Directory LDAP API 2.1.0 至 2.1.9（不含 2.1.9）之间的所有版本。 建议用户升级至 2.1.9 版本，该版本已修复此问题。
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache Directory LDAP API | 2.1.0< 2.1.9 |
affected |
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I. Basic Information for CVE-2026-103877
Vulnerability Information
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Vulnerability Title
Apache Directory LDAP API: Unsafe loading of Java code from LDAP schema elements
Source: CVE Program / CVE List V5
Vulnerability Description
Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API.
A rogue/compromised LDAP server (or pre-TLS MITM) can answer a client's loadSchema() subschema search with a schema object that contains a serialized Java class, allowing some potential RCE.
This issue affects Apache Directory LDAP API: from 2.1.0 before 2.1.9.
Users are recommended to upgrade to version 2.1.9, which fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache Directory LDAP API | 2.1.0 ~ 2.1.9 | - |
|
II. Public POCs for CVE-2026-103877
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Mailing List Discussions for CVE-2026-103877 (1)
Same Patch Batch · Apache Software Foundation · 2026-10-02 · 69 CVEs total
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