CVE-2026-103877

critical · 9.8

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.

9.8

CVSS

0.5%

EPSS (exploit prob.)

40th

EPSS percentile

2026-10-02

Published

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

Weaknesses

CWE-502

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-103877