Vulnerability-Lookup

CVE-2026-72914 (GCVE-0-2026-72914)

Vulnerability from cvelistv5 – Published: 2026-08-10 21:13 – Updated: 2026-08-11 13:24

Title

Mastodon: Exhausting data by an unauthenticated request to the admin retention API

Summary

Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1, the administrative statistics endpoints handled by Api::V1::Admin::MeasuresController and Api::V1::Admin::RetentionController checked authorization only after beginning expensive calculations. Anonymous callers could submit keys, start_at, and end_at parameters that caused long-running SQL queries in Admin::Metrics::Measure, Admin::Metrics::Retention, and Admin::Metrics::Dimension::BaseDimension, allowing repeated requests to exhaust server resources. This issue is fixed in versions 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-11 13:24 UTC

CWE

CWE-405 - Asymmetric Resource Consumption (Amplification)
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M mitre root

References

9 references

URL	Tags
https://github.com/mastodon/mastodon/security/adv…	x_refsource_CONFIRM
https://github.com/mastodon/mastodon/commit/18c61…	x_refsource_MISC
https://github.com/mastodon/mastodon/commit/467c9…	x_refsource_MISC
https://github.com/mastodon/mastodon/commit/930aa…	x_refsource_MISC
https://github.com/mastodon/mastodon/commit/da47a…	x_refsource_MISC
https://github.com/mastodon/mastodon/releases/tag…	x_refsource_MISC
https://github.com/mastodon/mastodon/releases/tag…	x_refsource_MISC
https://github.com/mastodon/mastodon/releases/tag…	x_refsource_MISC
https://github.com/mastodon/mastodon/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
mastodon	mastodon	Affected: < 4.4.21 Affected: >= 4.5.0-beta.1, < 4.5.14 Affected: >= 4.6.0-beta.1, < 4.6.4	guessed

Show details on NVD website

JSON

To clipboard

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        ],
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}

bit-mastodon-2026-72914

Vulnerability from bitnami_vulndb

Published

2026-08-17 05:46

Modified

2026-08-17 06:10

Summary

Mastodon: Exhausting data by an unauthenticated request to the admin retention API

Details

Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0, the administrative statistics endpoints handled by Api::V1::Admin::MeasuresController and Api::V1::Admin::RetentionController checked authorization only after beginning expensive calculations. Anonymous callers could submit keys, start_at, and end_at parameters that caused long-running SQL queries in Admin::Metrics::Measure, Admin::Metrics::Retention, and Admin::Metrics::Dimension::BaseDimension, allowing repeated requests to exhaust server resources. This issue is fixed in versions 4.4.21, 4.5.14, 4.6.4, and 4.7.0.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "mastodon",
        "purl": "pkg:bitnami/mastodon"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.4.21"
            },
            {
              "introduced": "4.5.0"
            },
            {
              "fixed": "4.5.14"
            },
            {
              "introduced": "4.6.0"
            },
            {
              "fixed": "4.6.4"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-72914"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:joinmastodon:mastodon:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0, the administrative statistics endpoints handled by Api::V1::Admin::MeasuresController and Api::V1::Admin::RetentionController checked authorization only after beginning expensive calculations. Anonymous callers could submit keys, start_at, and end_at parameters that caused long-running SQL queries in Admin::Metrics::Measure, Admin::Metrics::Retention, and Admin::Metrics::Dimension::BaseDimension, allowing repeated requests to exhaust server resources. This issue is fixed in versions 4.4.21, 4.5.14, 4.6.4, and 4.7.0.",
  "id": "BIT-mastodon-2026-72914",
  "modified": "2026-08-17T06:10:32.268Z",
  "published": "2026-08-17T05:46:36.585Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/commit/18c61f286f1f5718a8f517940ba384866ffa3892"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/commit/467c933459c7d0e5513475b9e4888afaedfb1074"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/commit/930aa9fee26bf9eaefe27826fa1061288d83373b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/commit/da47a1bd3cd07935d7ca55a1f4f1a76f7f167e0d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/releases/tag/v4.4.21"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/releases/tag/v4.5.14"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/releases/tag/v4.6.4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/releases/tag/v4.7.0-beta.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mastodon/mastodon/security/advisories/GHSA-7jvv-fhmg-wpfw"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72914"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Mastodon: Exhausting data by an unauthenticated request to the admin retention API"
}

FKIE_CVE-2026-72914

Vulnerability from fkie_nvd - Published: 2026-08-10 22:17 - Updated: 2026-09-09 20:55

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/mastodon/mastodon/commit/18c61f286f1f5718a8f517940ba384866ffa3892
	security-advisories@github.com	https://github.com/mastodon/mastodon/commit/467c933459c7d0e5513475b9e4888afaedfb1074
	security-advisories@github.com	https://github.com/mastodon/mastodon/commit/930aa9fee26bf9eaefe27826fa1061288d83373b
	security-advisories@github.com	https://github.com/mastodon/mastodon/commit/da47a1bd3cd07935d7ca55a1f4f1a76f7f167e0d
	security-advisories@github.com	https://github.com/mastodon/mastodon/releases/tag/v4.4.21
	security-advisories@github.com	https://github.com/mastodon/mastodon/releases/tag/v4.5.14
	security-advisories@github.com	https://github.com/mastodon/mastodon/releases/tag/v4.6.4
	security-advisories@github.com	https://github.com/mastodon/mastodon/releases/tag/v4.7.0-beta.1
	security-advisories@github.com	https://github.com/mastodon/mastodon/security/advisories/GHSA-7jvv-fhmg-wpfw

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "mastodon",
          "vendor": "mastodon",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.4.21"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.5.0-beta.1, \u003c 4.5.14"
            },
            {
              "status": "affected",
              "version": "\u003e= 4.6.0-beta.1, \u003c 4.6.4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1, the administrative statistics endpoints handled by Api::V1::Admin::MeasuresController and Api::V1::Admin::RetentionController checked authorization only after beginning expensive calculations. Anonymous callers could submit keys, start_at, and end_at parameters that caused long-running SQL queries in Admin::Metrics::Measure, Admin::Metrics::Retention, and Admin::Metrics::Dimension::BaseDimension, allowing repeated requests to exhaust server resources. This issue is fixed in versions 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1."
    }
  ],
  "id": "CVE-2026-72914",
  "lastModified": "2026-09-09T20:55:04.493",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-72914",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-11T13:24:19.660748Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-10T22:17:10.193",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/mastodon/mastodon/commit/18c61f286f1f5718a8f517940ba384866ffa3892"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/mastodon/mastodon/commit/467c933459c7d0e5513475b9e4888afaedfb1074"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/mastodon/mastodon/commit/930aa9fee26bf9eaefe27826fa1061288d83373b"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/mastodon/mastodon/commit/da47a1bd3cd07935d7ca55a1f4f1a76f7f167e0d"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/mastodon/mastodon/releases/tag/v4.4.21"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/mastodon/mastodon/releases/tag/v4.5.14"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/mastodon/mastodon/releases/tag/v4.6.4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/mastodon/mastodon/releases/tag/v4.7.0-beta.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/mastodon/mastodon/security/advisories/GHSA-7jvv-fhmg-wpfw"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-405"
        },
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

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

CVE-2026-72914 (GCVE-0-2026-72914)

bit-mastodon-2026-72914

Vulnerability from bitnami_vulndb

FKIE_CVE-2026-72914

Tags

Sightings

Nomenclature

Related by attack behaviour