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.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Apache Software Foundation | Apache Directory LDAP API | unaffected |
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No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Fri, 02 Oct 2026 10:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Apache Directory LDAP API: Unsafe loading of Java code from LDAP schema elements | |
| Weaknesses | CWE-502 | |
| References |
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: apache
Published:
Updated: 2026-10-02T10:08:42.494Z
Reserved: 2026-10-01T12:43:28.815Z
Link: CVE-2026-103877
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-10-02T10:17:06.437
Modified: 2026-10-02T10:17:06.437
Link: CVE-2026-103877
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-10-02T11:30:18Z
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CWE-502
Deserialization of Untrusted Data