Security advisory

{
  "id": "e9a7b478788a62bb1a02293c1d3f8cda372ca26c0b6b9ec4b091856ec266cbe0",
  "url": "https://osv.dev/vulnerability/CVE-2026-22551",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-22551",
    "summary": "In Eclipse Theia versions prior to 1.71.0, the AI chat rendered Markdown image tags from AI responses, triggering HTTP requests to arbitrary external URLs without restriction. Combined with prompt injection in a malicious workspace, an attacker could induce the AI agent to construct image URLs encoding sensitive information from the workspace or conversation context, exfiltrating it to attacker-controlled servers. The workspace trust enforcement introduced in v1.71.0 mitigates the documented attack chain by disabling AI features in untrusted workspaces.",
    "evidence": "osv:CVE-2026-22551",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-22551",
      "aliases": [
        "CVE-2026-22551",
        "GHSA-qwjm-9c66-w4q4"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/eclipse-theia/theia",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "5596c3c7d720b7e287e2b87a48403b0492a3fdb6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.71.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:eclipse:theia:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.71.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.70.0",
            "v1.69.0",
            "v1.68.0",
            "v1.67.0",
            "v1.66.0",
            "v1.65.0",
            "v1.64.0",
            "v1.63.0",
            "v1.62.0",
            "v1.61.0",
            "v1.60.0",
            "v1.59.0",
            "v1.58.0",
            "v1.57.0",
            "v1.55.0",
            "v1.56.0",
            "v1.54.0",
            "v1.53.0",
            "v1.52.0",
            "v1.50.0",
            "v1.49.0",
            "v1.48.0",
            "v1.47.0",
            "v1.46.0",
            "v1.45.0",
            "v1.44.0",
            "v1.43.0",
            "v1.42.0",
            "v1.41.0",
            "v1.40.0",
            "v1.39.0",
            "v1.38.0",
            "v1.37.0",
            "v1.36.0",
            "v1.35.0",
            "v1.34.0",
            "v1.33.0",
            "v1.32.0",
            "v1.31.0",
            "v1.30.0",
            "v1.29.0",
            "v1.28.0",
            "v1.27.0",
            "v1.26.0",
            "v1.25.0",
            "v1.24.0",
            "v1.23.0",
            "v1.22.1",
            "v1.22.0",
            "v1.21.0",
            "v1.20.0",
            "v1.17.0",
            "v1.16.0",
            "v1.15.0",
            "v1.14.0",
            "v1.13.0",
            "1.13.0",
            "v1.12.0",
            "v1.11.0",
            "v1.10.0",
            "v1.9.0",
            "v1.8.0",
            "v1.7.0",
            "v1.6.0",
            "v1.5.0",
            "v1.4.0",
            "v1.3.0",
            "v1.2.0",
            "v1.1.0",
            "v1.0.0",
            "v0.16.0",
            "v0.15.0",
            "v0.14.0",
            "v0.13.0",
            "v0.12.0",
            "v0.11.0",
            "v0.10.0",
            "v0.9.0",
            "v0.8.0",
            "v0.7.0",
            "v0.6.0",
            "v0.5.0",
            "v0.4.0",
            "v0.3.19",
            "v0.3.18",
            "v0.3.17",
            "v0.3.16",
            "v0.3.15",
            "v0.3.14",
            "v0.3.13",
            "v0.3.12",
            "v0.3.11",
            "v0.3.10",
            "v0.3.9",
            "v0.3.8",
            "v0.3.4",
            "v0.3.3",
            "v0.3.2",
            "v0.3.1",
            "v0.3.0",
            "v0.2.4",
            "v0.2.3",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.1",
            "v0.1.0",
            "0.0.1-alpha.2",
            "0.0.1-alpha.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22551.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.664655252Z",
      "provider": "osv",
      "references": [
        "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/115",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22551.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-22551",
        "https://github.com/eclipse-theia/theia"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-201",
          "CWE-829"
        ],
        "cna_assigner": "eclipse",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22551.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-22551",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 501068,
  "published_at": "2026-06-18T14:32:01.444+00:00"
}