{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-102356",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-09T22:34:57.248729Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-09T22:44:38.557Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "kroki",
          "vendor": "yuzutech",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.26.0, \u003c 0.31.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Kroki creates diagrams from textual descriptions. From 0.26.0 until 0.31.2, the optional Mermaid companion\u0027s mermaid/src/worker.js renders attacker-controlled flowchart image nodes in headless Chromium without a network request policy, even when KROKI_SAFE_MODE is set to secure. An actor who can submit Mermaid source and satisfy any authentication or authorization configured by the deployment can cause the companion to issue HTTP or HTTPS GET requests when requesting PNG output. Exploitation requires the Mermaid companion, PNG rendering through its headless Chromium process, a diagram-submission path available to the actor, and network reachability from the companion to the target. The demonstrated impact is limited to blind request reachability and possible state-changing GET endpoints; response exfiltration, cloud metadata access, port scanning, and access beyond the companion\u0027s network reachability are not established. This issue is fixed in version 0.31.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-06T17:38:49.280Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/yuzutech/kroki/security/advisories/GHSA-px99-rjv4-49g8",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/yuzutech/kroki/security/advisories/GHSA-px99-rjv4-49g8"
        },
        {
          "name": "https://github.com/yuzutech/kroki/commit/428ea380bc7db9da5c7947f908851c8461d51f82",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/yuzutech/kroki/commit/428ea380bc7db9da5c7947f908851c8461d51f82"
        },
        {
          "name": "https://github.com/yuzutech/kroki/releases/tag/v0.31.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/yuzutech/kroki/releases/tag/v0.31.2"
        }
      ],
      "source": {
        "advisory": "GHSA-px99-rjv4-49g8",
        "discovery": "UNKNOWN"
      },
      "title": "Kroki Mermaid companion SSRF via flowchart image URLs"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-102356",
    "datePublished": "2026-11-06T17:38:49.280Z",
    "dateReserved": "2026-09-28T22:38:42.255Z",
    "dateUpdated": "2026-11-09T22:44:38.557Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}