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Critical

cc-connect through 1.5.0 Missing Authentication via MAX Webhook Sender Spoofing

Type: advisorySources: OSV

cc-connect through 1.5.0 contains a missing authentication vulnerability in the MAX platform adapter webhook mode in platform/max/max.go that accepts unauthenticated updates when no webhook_secret is configured. Remote attackers reaching the webhook listener on port 8080 can forge updates with an allowed or admin user_id to run privileged commands like /shell on the host.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-108549
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 06:00 UTC · Revision 1

Source evidence

cc-connect through 1.5.0 Missing Authentication via MAX Webhook Sender Spoofing

core-osv · Original source

Published 10 Oct 2026, 14:35 UTC

cc-connect through 1.5.0 contains a missing authentication vulnerability in the MAX platform adapter webhook mode in platform/max/max.go that accepts unauthenticated updates when no webhook_secret is configured. Remote attackers reaching the webhook listener on port 8080 can forge updates with an allowed or admin user_id to run privileged commands like /shell on the host.

osv:CVE-2026-108549
Complete source record
{
  "id": "878588f9fe6a8886f53536ec21c79e0e0e5d9589a6d4c96d28079fd728336b9f",
  "url": "https://osv.dev/vulnerability/CVE-2026-108549",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "cc-connect through 1.5.0 Missing Authentication via MAX Webhook Sender Spoofing",
    "summary": "cc-connect through 1.5.0 contains a missing authentication vulnerability in the MAX platform adapter webhook mode in platform/max/max.go that accepts unauthenticated updates when no webhook_secret is configured. Remote attackers reaching the webhook listener on port 8080 can forge updates with an allowed or admin user_id to run privileged commands like /shell on the host.",
    "evidence": "osv:CVE-2026-108549",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-108549",
      "aliases": [
        "CVE-2026-108549"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/chenhg5/cc-connect",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "17c61062c2f9ce9bcdd45a2082e491f9743a2770"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.5.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.5.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.5.0",
            "v1.5.0-beta.5",
            "v1.5.0-beta.4",
            "v1.5.0-beta.3",
            "v1.5.0-beta.2",
            "v1.5.0-beta.1",
            "v1.3.3",
            "v1.3.3-beta.5",
            "v1.3.3-beta.4",
            "v1.3.3-beta.3",
            "v1.3.3-beta.2",
            "v1.3.3-beta.1",
            "v1.3.2",
            "v1.3.1",
            "v1.3.0",
            "v1.3.0-rc.5",
            "v1.3.0-rc.4",
            "v1.3.0-rc.3",
            "v1.3.0-rc.2",
            "v1.3.0-rc.1",
            "v1.2.2-beta.5",
            "v1.2.2-beta.4",
            "v1.2.2-beta.3",
            "v1.2.2-beta.2",
            "v1.2.2-beta.1",
            "v1.2.0",
            "v1.2.0-beta.7",
            "v1.2.0-beta.6",
            "v1.2.0-beta.5",
            "v1.2.0-beta.2",
            "v1.2.0-beta.1",
            "v1.1.0",
            "v1.1.0-beta.7",
            "v1.1.0-beta.6",
            "v1.1.0-beta.5",
            "v1.1.0-beta.4",
            "v1.1.0-beta.3",
            "v1.1.0-beta.2",
            "v1.1.0-beta.1",
            "v1.0.1",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-108549.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.163874086Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108549.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-108549",
        "https://www.vulncheck.com/advisories/cc-connect-through-1.5.0-missing-authentication-via-max-webhook-sender-spoofing",
        "https://github.com/chenhg5/cc-connect/issues/1968",
        "https://github.com/chenhg5/cc-connect",
        "https://github.com/chenhg5/cc-connect/blob/v1.5.0/platform/max/max.go#L287-L305"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-306"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108549.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-108549",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492902,
  "published_at": "2026-10-10T14:35:04.291+00:00"
}