Apache Answer: The custom avatar was not properly validated

{
  "id": "cab4a0a047466625d9f56faa9e670af1910be8594701894ca40a8314c32ea650",
  "url": "https://osv.dev/vulnerability/CVE-2026-34031",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Apache Answer: The custom avatar was not properly validated",
    "summary": "Unrestricted Upload of File with Dangerous Type vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. The server did not sufficiently validate user-supplied image URLs, allowing arbitrary external content to be embedded as profile images, which could expose users to unintended external requests and tracking by third-party servers. Users are recommended to upgrade to version 2.0.1, which fixes the issue.",
    "evidence": "osv:CVE-2026-34031",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-34031",
      "aliases": [
        "CVE-2026-34031",
        "GHSA-x4f6-mqg6-28xx",
        "GO-2026-6154"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/answer",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2746bf5b455fa67f1bec6178c75121397a3816f5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:answer:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.0.1-RC1",
            "v2.0.0-RC2",
            "v2.0.0",
            "v2.0.0-RC1",
            "v1.7.0-RC1",
            "v1.7.0",
            "v1.6.0",
            "v1.6.0-RC1",
            "v1.2.1-RC1",
            "v1.2.1",
            "v1.2.0-RC1",
            "v1.2.0",
            "v1.1.3",
            "v1.1.2",
            "v1.1.1",
            "v1.0.9",
            "v1.0.8",
            "v1.0.7",
            "v1.0.6",
            "v1.0.5",
            "v1.0.4",
            "v1.0.3",
            "v1.0.1",
            "v0.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34031.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.556692218Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34031.json",
        "https://lists.apache.org/thread/rwtxy39t54to9kv3dqtbjsbdpyk4jkd2",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-34031"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-434"
        ],
        "cna_assigner": "apache",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "2.0.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34031.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-34031",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 502999,
  "published_at": "2026-06-09T07:34:38.977+00:00"
}