Vulnerability-Lookup

UBUNTU-CVE-2026-103877 (CVE-2026-103877)

Vulnerability from osv_ubuntu – Published: 2026-10-05 00:00 – Updated: 2026-10-05 00:00 – Source website

Details

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.

Severity

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-103877	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-103877	REPORT
	https://www.openwall.com/lists/oss-security/2026/…	REPORT
	https://lists.apache.org/thread.html/sys8l881blqf…	REPORT
	http://www.openwall.com/lists/oss-security/2026/10/02/5	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libapache-directory-api-java",
            "binary_version": "1.0.0~M20-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "apache-directory-api",
        "purl": "pkg:deb/ubuntu/apache-directory-api@1.0.0~M20-3?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0~M20-3"
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    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libapache-directory-api-java",
            "binary_version": "1.0.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "apache-directory-api",
        "purl": "pkg:deb/ubuntu/apache-directory-api@1.0.0-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0~M20-5",
        "1.0.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libapache-directory-api-java",
            "binary_version": "1.0.0-1"
          }
        ]
      },
      "package": {
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        "purl": "pkg:deb/ubuntu/apache-directory-api@1.0.0-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
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      ]
    },
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      "ecosystem_specific": {
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          {
            "binary_name": "libapache-directory-api-java",
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          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
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        "purl": "pkg:deb/ubuntu/apache-directory-api@1.0.0-2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libapache-directory-api-java",
            "binary_version": "2.1.2-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "apache-directory-api",
        "purl": "pkg:deb/ubuntu/apache-directory-api@2.1.2-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.1.2-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libapache-directory-api-java",
            "binary_version": "2.1.2-2build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "apache-directory-api",
        "purl": "pkg:deb/ubuntu/apache-directory-api@2.1.2-2build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.1.2-2",
        "2.1.2-2build1"
      ]
    }
  ],
  "aliases": [],
  "details": "Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API. A rogue/compromised LDAP server (or pre-TLS MITM) can answer a client\u0027s 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.",
  "id": "UBUNTU-CVE-2026-103877",
  "modified": "2026-10-05T00:00:00Z",
  "published": "2026-10-05T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-103877"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-103877"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2026/10/02/5"
    },
    {
      "type": "REPORT",
      "url": "https://lists.apache.org/thread.html/sys8l881blqfgoc3o724jl32bmjl8pvw"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/10/02/5"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-103877"
  ]
}

CVE-2026-103877 (GCVE-0-2026-103877)

Vulnerability from cvelistv5 – Published: 2026-10-02 10:08 – Updated: 2026-10-02 21:07

Title

Apache Directory LDAP API: Unsafe loading of Java code from LDAP schema elements

Summary

Severity

No CVSS data available.

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

apache mitre root Scorecard

References

2 references

URL	Tags
https://lists.apache.org/thread.html/sys8l881blqf…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/10/02/5

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Directory LDAP API	Affected: 2.1.0 , < 2.1.9 (semver)

Credits

Claude Security The Apache Software Foundation

Show details on NVD website

JSON

To clipboard

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          "packageURL": "pkg:maven/org.apache.directory.api/api-ldap-schema-data",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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UBUNTU-CVE-2026-103877 (CVE-2026-103877)

CVE-2026-103877 (GCVE-0-2026-103877)

Tags

Sightings

Nomenclature

Related by attack behaviour