FKIE_CVE-2026-103877

Vulnerability from fkie_nvd - Published: 2026-10-02 10:17 - Updated: 2026-10-02 10:17
Severity
Summary
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.
References
security@apache.orghttps://lists.apache.org/thread.html/sys8l881blqfgoc3o724jl32bmjl8pvw
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "defaultStatus": "unaffected",
          "packageName": "org.apache.directory.api:api-ldap-schema-data",
          "packageURL": "pkg:maven/org.apache.directory.api/api-ldap-schema-data",
          "product": "Apache Directory LDAP API",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "2.1.9",
              "status": "affected",
              "version": "2.1.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@apache.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API.\n\n\n\nA 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.\u00a0\n\n\n\nThis issue affects Apache Directory LDAP API: from 2.1.0 before 2.1.9.\n\n\n\nUsers are recommended to upgrade to version 2.1.9, which fixes the issue."
    }
  ],
  "id": "CVE-2026-103877",
  "lastModified": "2026-10-02T10:17:06.437",
  "metrics": {},
  "published": "2026-10-02T10:17:06.437",
  "references": [
    {
      "source": "security@apache.org",
      "url": "https://lists.apache.org/thread.html/sys8l881blqfgoc3o724jl32bmjl8pvw"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "security@apache.org",
      "type": "Primary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • 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.



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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.