Security advisory

{
  "id": "f2c3884b2f7383c8c7bdd06b26d286a5e6c298b8e6b04bcd455ed6037557984f",
  "url": "https://osv.dev/vulnerability/CVE-2021-26544",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-26544",
    "summary": "Livy server version 0.7.0-incubating (only) is vulnerable to a cross site scripting issue in the session name. A malicious user could use this flaw to access logs and results of other users' sessions and run jobs with their privileges. This issue is fixed in Livy 0.7.1-incubating.",
    "evidence": "osv:CVE-2021-26544",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-26544",
      "aliases": [
        "CVE-2021-26544",
        "GHSA-74qp-233x-p5j8"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/livy",
              "type": "GIT",
              "events": [
                {
                  "introduced": "664503355d8bae763989ebac087122e306239d54"
                },
                {
                  "last_affected": "664503355d8bae763989ebac087122e306239d54"
                },
                {
                  "fixed": "4d8a912699683b973eee76d4e91447d769a0cb0d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:livy:0.7.0-incubating:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.7.0-incubating"
                      },
                      {
                        "last_affected": "0.7.0-incubating"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "4d8a912699683b973eee76d4e91447d769a0cb0d"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.7.0-incubating",
            "v0.7.0-incubating-rc4",
            "v0.7.0-incubating"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-26544.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:34.752135278Z",
      "provider": "osv",
      "references": [
        "https://github.com/apache/incubator-livy/commit/4d8a912699683b973eee76d4e91447d769a0cb0d",
        "https://lists.apache.org/thread.html/r2db14e7fd1e5ec2519e8828d43529bad623d75698cc7918af3a3f3ed%40%3Cuser.livy.apache.org%3E"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-26544",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385639,
  "published_at": "2021-02-20T09:15:12.377+00:00"
}