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    2 vulnerabilities found for Collectives by Nextcloud

    CVE-2026-77166 (GCVE-0-2026-77166)

    Vulnerability from nvd – Published: 2026-09-21 15:25 – Updated: 2026-09-21 18:43
    VLAI
    Summary
    The emoji field in the page emoji update endpoint does not properly validate user input. By injecting long text and line breaks, the sidebar layout becomes broken and can hide other items.
    Severity
    2.4 (Low)
    CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-21 18:42 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    Nextcloud Collectives Affected: 3.2.1 , ≤ 3.5.0 (semver)
    		Create a notification for this product.
    Credits
    _dha (yoyomiski)
    Show details on NVD website
    To clipboard 

    {
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        "metrics": [
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              "content": {
                "id": "CVE-2026-77166",
                "options": [
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                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-21T18:42:53.420732Z",
                "version": "2.0.3"
              },
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-21T18:43:30.904Z",
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          "shortName": "CISA-ADP"
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        "references": [
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            ],
            "url": "https://hackerone.com/reports/3599470"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Collectives",
          "vendor": "Nextcloud",
          "versions": [
            {
              "lessThanOrEqual": "3.5.0",
              "status": "affected",
              "version": "3.2.1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "_dha (yoyomiski)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The emoji field in the page emoji update endpoint does not properly validate user input. By injecting long text and line breaks, the sidebar layout becomes broken and can hide other items."
        }
      ],
      "metrics": [
        {
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            "baseSeverity": "LOW",
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          }
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      ],
      "problemTypes": [
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      "providerMetadata": {
        "dateUpdated": "2026-09-21T15:25:33.269Z",
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    "datePublished": "2026-09-21T15:25:33.269Z",
    "dateReserved": "2026-08-20T15:00:00.606Z",
    "dateUpdated": "2026-09-21T18:43:30.904Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2026-77166 (GCVE-0-2026-77166)

    Vulnerability from cvelistv5 – Published: 2026-09-21 15:25 – Updated: 2026-09-21 18:43
    VLAI
    Summary
    The emoji field in the page emoji update endpoint does not properly validate user input. By injecting long text and line breaks, the sidebar layout becomes broken and can hide other items.
    Severity
    2.4 (Low)
    CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-21 18:42 UTC
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    Nextcloud Collectives Affected: 3.2.1 , ≤ 3.5.0 (semver)
    		Create a notification for this product.
    Credits
    _dha (yoyomiski)
    Show details on NVD website
    To clipboard 

    {
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      {
        "metrics": [
          {
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                "id": "CVE-2026-77166",
                "options": [
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                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-21T18:42:53.420732Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-21T18:43:30.904Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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            ],
            "url": "https://hackerone.com/reports/3599470"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Collectives",
          "vendor": "Nextcloud",
          "versions": [
            {
              "lessThanOrEqual": "3.5.0",
              "status": "affected",
              "version": "3.2.1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "_dha (yoyomiski)"
        }
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          "value": "The emoji field in the page emoji update endpoint does not properly validate user input. By injecting long text and line breaks, the sidebar layout becomes broken and can hide other items."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 2.4,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N",
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          }
        }
      ],
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      "references": [
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