FKIE_CVE-2026-52798

Vulnerability from fkie_nvd - Published: 2026-06-24 21:16 - Updated: 2026-06-25 18:16
Severity
8.9 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L
Summary
Gogs is an open source self-hosted Git service. Prior to 0.14.3, although .ipynb previews are sanitized on the server side via /-/api/sanitize_ipynb, the inserted content is re-rendered on the client side without sanitization using marked() on elements with the .nb-markdown-cell class. During this process, links containing schemes such as javascript: can be regenerated. As a result, when a victim views an attacker-crafted .ipynb file and clicks the link, arbitrary JavaScript is executed in the Gogs origin, leading to a click-based Stored XSS. This vulnerability is fixed in 0.14.3.
References
security-advisories@github.comhttps://github.com/gogs/gogs/commit/17b168b11ca759a7550e1f4bbd68bbde14db7785
security-advisories@github.comhttps://github.com/gogs/gogs/pull/8319
security-advisories@github.comhttps://github.com/gogs/gogs/releases/tag/v0.14.3
security-advisories@github.comhttps://github.com/gogs/gogs/security/advisories/GHSA-jq8v-rmf6-65jw
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/gogs/gogs/security/advisories/GHSA-jq8v-rmf6-65jw
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "gogs",
          "vendor": "gogs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.14.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Gogs is an open source self-hosted Git service. Prior to 0.14.3, although .ipynb previews are sanitized on the server side via /-/api/sanitize_ipynb, the inserted content is re-rendered on the client side without sanitization using marked() on elements with the .nb-markdown-cell class. During this process, links containing schemes such as javascript: can be regenerated. As a result, when a victim views an attacker-crafted .ipynb file and clicks the link, arbitrary JavaScript is executed in the Gogs origin, leading to a click-based Stored XSS. This vulnerability is fixed in 0.14.3."
    }
  ],
  "id": "CVE-2026-52798",
  "lastModified": "2026-06-25T18:16:39.817",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 8.9,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 6.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-52798",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-25T17:14:47.335180Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-06-24T21:16:55.533",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/gogs/gogs/commit/17b168b11ca759a7550e1f4bbd68bbde14db7785"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/gogs/gogs/pull/8319"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/gogs/gogs/releases/tag/v0.14.3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/gogs/gogs/security/advisories/GHSA-jq8v-rmf6-65jw"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/gogs/gogs/security/advisories/GHSA-jq8v-rmf6-65jw"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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