CVE-2026-103552— Apache Directory LDAP API: A unbound client can send a deeply nested search filter that overflows the stack in the server's decoder
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 中存在栈溢出漏洞。 在绑定（bind）操作之前，客户端可以发送一个深层嵌套的搜索过滤器，导致服务器端的解码器发生栈溢出。 此问题影响 Apache Directory LDAP API 从 1.2.0 到 1.2.9（不含 1.2.9）的所有版本。 建议用户升级至修复了该问题的版本 1.2.9。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache Directory LDAP API | 1.2.0< 1.2.9 |
affected |
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I. Basic Information for CVE-2026-103552
Vulnerability Information
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Vulnerability Title
Apache Directory LDAP API: A unbound client can send a deeply nested search filter that overflows the stack in the server's decoder
Source: CVE Program / CVE List V5
Vulnerability Description
Stack Overflow vulnerability in Apache Directory LDAP API.
Before binding, a client can send a deeply nested search filter that overflows the stack in the server's decoder.
This issue affects Apache Directory LDAP API: from 1.2.0 before 1.2.9.
Users are recommended to upgrade to version 1.2.9, which fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache Directory LDAP API | 1.2.0 ~ 1.2.9 | - |
|
II. Public POCs for CVE-2026-103552
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2026-103552 (1)
Same Patch Batch · Apache Software Foundation · 2026-10-02 · 69 CVEs total
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| CVE-2026-61373 | 8.7 HIGH | Apache Thrift: Java TSaslNonblockingServer pre-auth unbounded SASL frame allocation |
| CVE-2026-66859 | 8.7 HIGH | Apache Thrift: c_glib multiplexed processor crashes on a message it cannot route |
| CVE-2026-94658 | 8.7 HIGH | Apache Thrift: Lua `TFramedTransport`/`THttpTransport` re-slice the buffer on every read ( |
| CVE-2026-94646 | 8.7 HIGH | Apache Thrift: Node.js `server.js` ends the process on any per-connection error (+ two tri |
| CVE-2026-87117 | 8.7 HIGH | Apache Thrift: PHP `thrift_protocol` accelerator dereferences a missing container-element |
| CVE-2026-86535 | 8.7 HIGH | Apache Thrift: A JSON member name can stall the Node server's event loop indefinitely |
| CVE-2026-82458 | 8.7 HIGH | Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, |
| CVE-2026-96294 | 8.7 HIGH | Apache Thrift: nodejs web server: no `error` listener on an upgraded WebSocket connection |
| CVE-2026-86537 | 8.7 HIGH | Apache Thrift: A truncated HTTP request stops the D library's server, allowing an unauthen |
| CVE-2026-94642 | 8.7 HIGH | Apache Thrift: PHP `TSimpleServer` exits the whole process on any non-transport exception |
| CVE-2026-85493 | 8.7 HIGH | Apache Thrift, Apache Thrift: TProtocolUtil.skip follows peer-chosen nesting to any depth |
| CVE-2026-85494 | 8.7 HIGH | Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, |
| CVE-2026-91137 | 8.7 HIGH | Apache Thrift: PHP `thrift_protocol` accelerator: zero-byte container elements |
| CVE-2026-93925 | 8.7 HIGH | Apache Thrift: C++ `THeaderTransport::writeVarint32()` stack buffer overflow on a negative |
| CVE-2026-93926 | 8.7 HIGH | Apache Thrift: C++ `THeaderTransport::untransform()` leaks the zlib stream on the error pa |
| CVE-2026-94633 | 8.7 HIGH | Apache Thrift: Dart `TBinaryProtocol.readMessageBegin` allocates from the pre-versioned na |
| CVE-2026-94635 | 8.7 HIGH | Apache Thrift: Lua `TBinaryProtocol:readMessageBegin` bypasses `checkStringSize` on the pr |
Showing top 20 of 69 CVEs. View all on vendor page → →
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V. Comments for CVE-2026-103552
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