Vulnerability-Lookup

GHSA-Q4PX-5X5J-5P92

Vulnerability from github – Published: 2026-10-02 12:31 – Updated: 2026-10-02 12:31

Details

Asymmetric Resource Consumption vulnerability in Apache Directory LDAP API.

Storing a password using the bcrypt algorithm with a high force like 30 in a LDAP server that supports this algorithm will cause the server CPU to run for hours checking the credentials. A bounded cost should be enforced to avoid a server DOS.

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.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-103880"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-405"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-02T10:17:06Z",
    "severity": null
  },
  "details": "Asymmetric Resource Consumption\u00a0vulnerability in Apache Directory LDAP API.\n\n\n\nStoring a password using the bcrypt algorithm with a high force like 30 in a LDAP server that supports this algorithm will cause the server CPU to\u00a0 run for hours checking the credentials. A bounded cost should be enforced to avoid a server DOS.\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": "GHSA-q4px-5x5j-5p92",
  "modified": "2026-10-02T12:31:10Z",
  "published": "2026-10-02T12:31:09Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-103880"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/39q63m54v9go6xj7pqj7q18c3szn9go4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-103880 (GCVE-0-2026-103880)

Vulnerability from cvelistv5 – Published: 2026-10-02 10:03 – Updated: 2026-10-02 21:07

Title

Apache Directory LDAP API: Denial of service via excessive bcrypt cost factor in stored passwords

Summary

Asymmetric Resource Consumption vulnerability in Apache Directory LDAP API. Storing a password using the bcrypt algorithm with a high force like 30 in a LDAP server that supports this algorithm will cause the server CPU to run for hours checking the credentials. A bounded cost should be enforced to avoid a server DOS. 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

No CVSS data available.

CWE

CWE-405 - Asymmetric Resource Consumption (Amplification)

Assigner

apache mitre root Scorecard

References

2 references

URL	Tags
https://lists.apache.org/thread.html/39q63m54v9go…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/10/02/7

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

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-10-02T21:07:23.392Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/10/02/7"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "defaultStatus": "unaffected",
          "packageName": "org.apache.directory.api:api-ldap-model",
          "packageURL": "pkg:maven/org.apache.directory.api/api-ldap-model",
          "product": "Apache Directory LDAP API",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "2.1.9",
              "status": "affected",
              "version": "2.1.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "tool",
          "value": "Claude Security"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "The Apache Software Foundation"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eAsymmetric Resource Consumption\u0026nbsp;vulnerability in Apache Directory LDAP API.\u003c/p\u003e\u003cp\u003eStoring a password using the bcrypt algorithm with a high force like 30 in a LDAP server that supports this algorithm will cause the server CPU to\u0026nbsp; run for hours checking the credentials. A bounded cost should be enforced to avoid a server DOS.\u003c/p\u003e\u003cp\u003eThis issue affects Apache Directory LDAP API: from 2.1.0 before 2.1.9.\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version 2.1.9, which fixes the issue.\u003c/p\u003e"
            }
          ],
          "value": "Asymmetric Resource Consumption\u00a0vulnerability in Apache Directory LDAP API.\n\n\n\nStoring a password using the bcrypt algorithm with a high force like 30 in a LDAP server that supports this algorithm will cause the server CPU to\u00a0 run for hours checking the credentials. A bounded cost should be enforced to avoid a server DOS.\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."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "important"
            },
            "type": "Textual description of severity"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-405",
              "description": "CWE-405 Asymmetric Resource Consumption (Amplification)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-02T10:03:48.296Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.apache.org/thread.html/39q63m54v9go6xj7pqj7q18c3szn9go4"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Apache Directory LDAP API: Denial of service via excessive bcrypt cost factor in stored passwords",
      "x_generator": {
        "engine": "Vulnogram 1.0.3"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-103880",
    "datePublished": "2026-10-02T10:03:48.296Z",
    "dateReserved": "2026-10-01T13:05:10.819Z",
    "dateUpdated": "2026-10-02T21:07:23.392Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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.

Related by attack behaviour

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.

Action not permitted

GHSA-Q4PX-5X5J-5P92

CVE-2026-103880 (GCVE-0-2026-103880)

Tags

Sightings

Nomenclature

Related by attack behaviour