CVE-2026-103877

9.8 CRITICAL

Published 2026-10-02 · Updated 2026-10-07

AI risk analysis

Summary: The flaw is a deserialization vulnerability in the Apache Directory LDAP API, allowing attackers to execute arbitrary code via a specially crafted schema object. This matters because it can lead to remote code execution (RCE) on the affected system.
Exploitability: Exploiting this issue is relatively straightforward given a rogue LDAP server or pre-TLS MITM attacker. The attacker must be able to control the schema search response.
Blast radius: If exploited, this could result in full system compromise, as the vulnerability allows for remote code execution.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to Apache Directory LDAP API version 2.1.9 or later.

rceldapapideserializationjava

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-502

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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