{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.9.0a11"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "11637401d50629fef040382aee5af4571842c152"
            }
          ],
          "repo": "https://github.com/eidetic-labs/stigmem",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-5p3m-vhh6-9236"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76239.json"
  },
  "details": "Stigmem before 0.9.0a11 fails to validate the delivery_address parameter when creating webhook subscriptions, allowing authenticated users to specify internal loopback and private network destinations. Attackers can trigger matching fact-change events to cause the Stigmem server to issue server-side HTTP POST requests to internal services, enabling blind SSRF attacks against localhost and private network endpoints.",
  "id": "CVE-2026-76239",
  "modified": "2026-08-23T03:42:34.983338837Z",
  "published": "2026-08-19T14:02:17.336Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76239.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-5p3m-vhh6-9236"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76239"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/stigmem-before-0a11-ssrf-via-unvalidated-webhook-delivery-address"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Stigmem before 0.9.0a11 SSRF via unvalidated webhook delivery_address"
}