{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-103877", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-10-01T12:43:28.815Z", "datePublished": "2026-10-02T10:08:42.494Z", "dateUpdated": "2026-10-02T21:07:21.080Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-10-02T10:08:42.494Z"}, "title": "Apache Directory LDAP API: Unsafe loading of Java code from LDAP schema elements", "problemTypes": [{"descriptions": [{"description": "CWE-502 Deserialization of Untrusted Data", "lang": "en", "cweId": "CWE-502", "type": "CWE"}]}], "source": {"discovery": "INTERNAL"}, "affected": [{"vendor": "Apache Software Foundation", "product": "Apache Directory LDAP API", "packageURL": "pkg:maven/org.apache.directory.api/api-ldap-schema-data", "versions": [{"status": "affected", "version": "2.1.0", "lessThan": "2.1.9", "versionType": "semver"}], "defaultStatus": "unaffected", "collectionURL": "https://repo.maven.apache.org/maven2", "packageName": "org.apache.directory.api:api-ldap-schema-data"}], "descriptions": [{"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's 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.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<pre>Deserialization of Untrusted Data <span>vulnerability in Apache Directory LDAP API.</span></pre><p>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.&nbsp;</p><p>This issue affects Apache Directory LDAP API: from 2.1.0 before 2.1.9.</p><p>Users are recommended to upgrade to version 2.1.9, which fixes the issue.</p>"}]}], "references": [{"url": "https://lists.apache.org/thread.html/sys8l881blqfgoc3o724jl32bmjl8pvw", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "critical"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "credits": [{"lang": "en", "value": "Claude Security", "type": "tool"}, {"lang": "en", "value": "The Apache Software Foundation", "type": "finder"}], "x_generator": {"engine": "Vulnogram 1.0.3"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/10/02/5"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-10-02T21:07:21.080Z"}}]}}

{}

{"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's 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": "2026-10-02T22:16:53.577", "metrics": {}, "published": "2026-10-02T10:17:06.437", "references": [{"source": "security@apache.org", "url": "https://lists.apache.org/thread.html/sys8l881blqfgoc3o724jl32bmjl8pvw"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/10/02/5"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "security@apache.org", "type": "Secondary"}]}

{"bugzilla": {"description": "org.apache.directory.api/api-ldap-client-api: Apache Directory LDAP API: Remote code execution via untrusted Java object deserialization", "id": "2544997", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544997"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-502", "details": ["A flaw was found in Apache Directory LDAP API. This vulnerability allows a rogue or compromised LDAP server, or a network attacker performing a man-in-the-middle (MitM) attack, to execute arbitrary code on the client. During a schema search request, an attacker can return a crafted schema object containing a serialized Java class, triggering unsafe deserialization when processed by the client application."], "name": "CVE-2026-103877", "package_state": [{"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Affected", "package_name": "api-ldap-client-api", "product_name": "Red Hat Fuse 7"}], "public_date": "2026-10-02T10:08:42Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-103877\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-103877\nhttps://lists.apache.org/thread.html/sys8l881blqfgoc3o724jl32bmjl8pvw"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.1.0,2.1.9)"}}], "enrichment": {"confidence": 88.0, "confidence_source": "matching", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 88.0, "source": "matching"}]}, "original": {"product": "Apache Directory LDAP API", "source": "cna", "vendor": "Apache Software Foundation"}, "product": "directory_ldap_api", "vendor": "apache"}], "created": "2026-10-02T11:30:18.295601+00:00", "updated": "2026-10-02T14:15:14.564899+00:00", "vendors": ["apache", "apache$PRODUCT$directory_ldap_api"]}