OpenHarness Path Traversal Information Disclosure via /memory show

{
  "id": "5e5b8d5223a31605a0ab9f60f89e057e8b20239e6630d6501588ef1228347e1a",
  "url": "https://osv.dev/vulnerability/CVE-2026-40503",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OpenHarness Path Traversal Information Disclosure via /memory show",
    "summary": "OpenHarness prior to commit dd1d235 contains a path traversal vulnerability that allows remote gateway users with chat access to read arbitrary files by supplying path traversal sequences to the /memory show slash command. Attackers can manipulate the path input parameter to escape the project memory directory and access sensitive files accessible to the OpenHarness process without filesystem containment validation.",
    "evidence": "osv:CVE-2026-40503",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-40503",
      "aliases": [
        "CVE-2026-40503"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/HKUDS/OpenHarness",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "dd1d235450dd987b20bff01b7bfb02fe8620a0af"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "dd1d235450dd987b20bff01b7bfb02fe8620a0af"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.1.6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-40503.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.045607243Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40503.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-40503",
        "https://www.vulncheck.com/advisories/openharness-path-traversal-information-disclosure-via-memory-show",
        "https://github.com/HKUDS/OpenHarness/pull/127",
        "https://github.com/HKUDS/OpenHarness/commit/dd1d235450dd987b20bff01b7bfb02fe8620a0af",
        "https://github.com/HKUDS/OpenHarness"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40503.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-40503",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493370,
  "published_at": "2026-04-16T00:08:09.535+00:00"
}