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GHSA-VGJM-2CPF-4G7C

Vulnerability from github – Published: 2026-03-05 20:16 – Updated: 2026-03-05 22:28
VLAI
Summary
Gogs: DOM-based XSS via milestone selection
Details

Summary

It was confirmed in a test environment that an attacker can store an HTML/JavaScript payload in a repository’s Milestone name, and when another user selects that Milestone on the New Issue page (/issues/new), a DOM-Based XSS is triggered.

Impact

  • Theft of information accessible in the victim’s session.
  • Extraction of CSRF tokens and submission of state-changing requests with the victim’s privileges.
  • Repository operations performed with the victim’s privileges (Issue operations, settings changes, etc.).

(The impact scope depends on the victim’s permission level.)

Remediation

A fix is available at https://github.com/gogs/gogs/releases/tag/v0.14.2

Severity
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "gogs.io/gogs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.13.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-26276"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-05T20:16:20Z",
    "nvd_published_at": "2026-03-05T19:16:04Z",
    "severity": "HIGH"
  },
  "details": "# Summary\n\nIt was confirmed in a test environment that an attacker can store an HTML/JavaScript payload in a repository\u2019s **Milestone name**, and when another user selects that Milestone on the **New Issue** page (`/issues/new`), a **DOM-Based XSS** is triggered.\n\n# Impact\n\n* Theft of information accessible in the victim\u2019s session.\n* Extraction of CSRF tokens and submission of state-changing requests with the victim\u2019s privileges.\n* Repository operations performed with the victim\u2019s privileges (Issue operations, settings changes, etc.).\n\n(The impact scope depends on the victim\u2019s permission level.)\n\n# Remediation\n\nA fix is available at https://github.com/gogs/gogs/releases/tag/v0.14.2",
  "id": "GHSA-vgjm-2cpf-4g7c",
  "modified": "2026-03-05T22:28:52Z",
  "published": "2026-03-05T20:16:20Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/gogs/gogs/security/advisories/GHSA-vgjm-2cpf-4g7c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26276"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gogs/gogs/pull/8178"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gogs/gogs/commit/9001a68cdda7bd9c078ffd6d1c4622905ac11e5c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/gogs/gogs"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gogs/gogs/releases/tag/v0.14.2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Gogs: DOM-based XSS via milestone selection"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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