smart-sso through 2.1.1 OAuth2 Authorization Code Theft via Unvalidated redirectUri

{
  "id": "633006f47df3f9008dffdc41eb8a4fba3299d2401d610bdfb2033a65adf5678d",
  "url": "https://osv.dev/vulnerability/CVE-2026-111622",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "smart-sso through 2.1.1 OAuth2 Authorization Code Theft via Unvalidated redirectUri",
    "summary": "smart-sso through 2.1.1 contains an open redirect vulnerability in the /login handler that allows unauthenticated attackers to steal OAuth2 authorization codes by supplying an unvalidated redirectUri parameter. Attackers can send crafted /login links to users with active SSO sessions, then redeem stolen codes at /oauth2/access_token with any valid client credentials to obtain victims' access tokens.",
    "evidence": "osv:CVE-2026-111622",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-111622",
      "aliases": [
        "CVE-2026-111622"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/a466350665/smart-sso",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "13c38f6159fb2354f63ab3d1c8e8d64692b51e74"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.1.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.1.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.1.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111622.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.184119276Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111622.json",
        "https://hackmd.io/@hieuPenguinnn/smart-sso-oauth2-code-leak-open-redirect",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-111622",
        "https://www.vulncheck.com/advisories/smart-sso-through-2.1.1-oauth2-authorization-code-theft-via-unvalidated-redirecturi",
        "https://github.com/a466350665/smart-sso",
        "https://github.com/a466350665/smart-sso/blob/1.6.0/smart-sso-server/src/main/java/openjoe/smart/sso/server/controller/LoginController.java#L50-L59",
        "https://github.com/a466350665/smart-sso/blob/1.6.0/smart-sso-server/src/main/java/openjoe/smart/sso/server/controller/Oauth2Controller.java#L55-L84",
        "https://github.com/a466350665/smart-sso/blob/2.1.1/smart-sso-server/src/main/java/com/smart/sso/server/controller/LoginController.java#L53-L63"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-601"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111622.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-111622",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505775,
  "published_at": "2026-10-16T17:38:58.736+00:00"
}