expat — security advisory

{
  "id": "48576a9efdd705270275669c4bd754a1a336392fd0237641b82ba2eeac9c0e96",
  "url": "https://osv.dev/vulnerability/ECHO-77e5-0c9b-7930",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ECHO-77e5-0c9b-7930",
    "summary": "ECHO-77e5-0c9b-7930",
    "evidence": "osv:ECHO-77e5-0c9b-7930",
    "products": [
      {
        "name": {
          "value": "expat",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.0-1+e2",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "ECHO-77e5-0c9b-7930",
      "aliases": [
        "ECHO-77e5-0c9b-7930"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.0-1+e2"
                }
              ]
            }
          ],
          "package": {
            "name": "expat",
            "purl": "pkg:deb/echo/expat",
            "ecosystem": "Echo"
          },
          "database_specific": {
            "source": "https://advisory.echohq.com/osv/ECHO-77e5-0c9b-7930.json"
          }
        }
      ],
      "modified": "2026-10-23T11:45:02.997496487Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-115506"
      ],
      "references": [
        "https://advisory.echohq.com/cve/CVE-2026-115506",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-115506",
        "https://github.com/hannob/lololol",
        "https://github.com/libexpat/libexpat",
        "https://github.com/libexpat/libexpat/issues/1160",
        "https://github.com/libexpat/libexpat/pull/1433",
        "https://www.vulncheck.com/advisories/libexpat-through-2.9.0-denial-of-service-via-billion-laughs-detection-delay"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-115506",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 412768,
  "published_at": "2026-10-23T11:19:22.658+00:00"
}