FKIE_CVE-2026-25808

Vulnerability from fkie_nvd - Published: 2026-02-09 22:16 - Updated: 2026-02-28 00:17
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Prior to 0.6.20 and 0.7.2, there is a security vulnerability where DMs and followers-only posts were exposed through the ActivityPub outbox endpoint without authorization. This vulnerability is fixed in 0.6.20 and 0.7.2.
References
security-advisories@github.comhttps://github.com/fedify-dev/hollo/commit/329969c502ef092d5c3f9c2c20421c34f4ff0f0ePatch
security-advisories@github.comhttps://github.com/fedify-dev/hollo/releases/tag/0.6.20Product, Release Notes
security-advisories@github.comhttps://github.com/fedify-dev/hollo/releases/tag/0.7.2Product, Release Notes
security-advisories@github.comhttps://github.com/fedify-dev/hollo/security/advisories/GHSA-6r2w-3pcj-v4v5Vendor Advisory, Exploit
Impacted products
Vendor Product Version
fedify hollo *
fedify hollo *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:fedify:hollo:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A1422F95-7A77-4327-B1F1-95B79678E9AB",
              "versionEndExcluding": "0.6.20",
              "versionStartIncluding": "0.6.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fedify:hollo:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "10E08CBE-B4F8-4DF9-A84F-BCC0BAEF3A4C",
              "versionEndExcluding": "0.7.2",
              "versionStartIncluding": "0.7.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Hollo is a federated single-user microblogging software designed to be federated through ActivityPub. Prior to 0.6.20 and 0.7.2, there is a security vulnerability where DMs and followers-only posts were exposed through the ActivityPub outbox endpoint without authorization. This vulnerability is fixed in 0.6.20 and 0.7.2."
    },
    {
      "lang": "es",
      "value": "Hollo es un software de microblogging de un solo usuario federado dise\u00f1ado para ser federado a trav\u00e9s de ActivityPub. Antes de 0.6.20 y 0.7.2, existe una vulnerabilidad de seguridad donde los mensajes directos (MD) y las publicaciones solo para seguidores fueron expuestos a trav\u00e9s del endpoint de bandeja de salida de ActivityPub sin autorizaci\u00f3n. Esta vulnerabilidad est\u00e1 corregida en 0.6.20 y 0.7.2."
    }
  ],
  "id": "CVE-2026-25808",
  "lastModified": "2026-02-28T00:17:33.850",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-09T22:16:02.440",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/fedify-dev/hollo/commit/329969c502ef092d5c3f9c2c20421c34f4ff0f0e"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://github.com/fedify-dev/hollo/releases/tag/0.6.20"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://github.com/fedify-dev/hollo/releases/tag/0.7.2"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory",
        "Exploit"
      ],
      "url": "https://github.com/fedify-dev/hollo/security/advisories/GHSA-6r2w-3pcj-v4v5"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.