{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "go.probo.inc/probo"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.204.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-49820"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-30T18:31:50Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nProbo\u0027s `saferedirect` package validates redirect URLs used across authentication flows (OIDC, SAML, session transfer, OAuth connectors, and trust-center magic links). The validator only inspected the second character of relative paths, so a URL like `/../\\evil.com` passed validation because the second character is `.`. Go\u0027s `http.Redirect` normalizes this path to `/\\evil.com` before setting the `Location` header. Browsers can interpret the backslash as a host separator and redirect the user to an external domain (`https://evil.com`), bypassing the intended same-origin restriction. This enables open-redirect phishing: an attacker can craft a `continue` parameter (or embed a malicious URL in a session-transfer token) that appears to originate from a trusted Probo domain but redirects victims elsewhere.\n\n### Patches\nFixed in `go.probo.inc/probo` by normalizing relative paths with `path.Clean` before validation, rejecting backslashes (including\npercent-encoded `%5c`) anywhere in the path, and re-checking the normalized result for protocol-relative and backslash prefixes.\n\nSelf-hosted deployments should upgrade to **probod v0.194.1** or later.\n\nSaaS deployments on getprobo.com are patched.\n\n### Workarounds\nNo practical workaround for self-hosted installations. Upgrade to the patched release.",
  "id": "GHSA-x7qq-m748-8p2c",
  "modified": "2026-06-30T18:31:50Z",
  "published": "2026-06-30T18:31:50Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/getprobo/probo/security/advisories/GHSA-x7qq-m748-8p2c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/getprobo/probo"
    },
    {
      "type": "WEB",
      "url": "https://github.com/getprobo/probo/blob/main/SECURITY_NOTES.md"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Probo has an open redirect bypass via path normalization"
}