CVE-2026-103877

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 v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread.html/sys8l881blqfgoc3o724jl32bmjl8pvw
http://www.openwall.com/lists/oss-security/2026/10/02/5

Configurations

No configuration.

History

07 Oct 2026, 23:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8

02 Oct 2026, 22:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/10/02/5 -

02 Oct 2026, 10:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-02 10:17

Updated : 2026-10-07 23:16

NVD link : CVE-2026-103877

Mitre link : CVE-2026-103877

CVE.ORG link : CVE-2026-103877

JSON object : View

Products Affected

No product.

CWE

CWE-502

Deserialization of Untrusted Data

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