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CVE-2026-92702 (GCVE-0-2026-92702)

Vulnerability from cvelistv5 – Published: 2026-09-18 17:02 – Updated: 2026-09-18 17:02
VLAI
Title
Cocos AI: Intra-handshake attested TLS implementation can accept Evidence with nil, empty, or omitted reportData in the AMD SEV-SNP path
Summary
Cocos AI is a confidential computing system for running AI workloads inside trusted execution environments. In versions up to and including 0.8.2, the intra-handshake attested TLS (aTLS) AMD SEV-SNP verification path does not enforce attestation freshness when the expected reportData value is nil, empty, or omitted, leaving the SEV-SNP policy ReportData unset so the verifier accepts unrelated or stale Evidence not bound to the current connection. A relying party that uses this path without an expected reportData as a trust or authorization decision can be induced to trust an unintended attestation context; a supplied non-empty reportData is still validated. The issue is fixed in version 0.9.0.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-346 - Origin Validation Error
Assigner
References
Impacted products
Vendor Product Version CPE status
ultravioletrs cocos Affected: < 0.9.0
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "cocos",
          "vendor": "ultravioletrs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.9.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Cocos AI is a confidential computing system for running AI workloads inside trusted execution environments. In versions up to and including 0.8.2, the intra-handshake attested TLS (aTLS) AMD SEV-SNP verification path does not enforce attestation freshness when the expected reportData value is nil, empty, or omitted, leaving the SEV-SNP policy ReportData unset so the verifier accepts unrelated or stale Evidence not bound to the current connection. A relying party that uses this path without an expected reportData as a trust or authorization decision can be induced to trust an unintended attestation context; a supplied non-empty reportData is still validated. The issue is fixed in version 0.9.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-346",
              "description": "CWE-346: Origin Validation Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-18T17:02:48.370Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/ultravioletrs/cocos/security/advisories/GHSA-4r6g-mp48-j2rw",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ultravioletrs/cocos/security/advisories/GHSA-4r6g-mp48-j2rw"
        },
        {
          "name": "https://github.com/ultravioletrs/cocos/pull/582",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ultravioletrs/cocos/pull/582"
        },
        {
          "name": "https://github.com/ultravioletrs/cocos/commit/80bf813c48300f02259b338b91f844c71be582ea",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ultravioletrs/cocos/commit/80bf813c48300f02259b338b91f844c71be582ea"
        },
        {
          "name": "https://github.com/ultravioletrs/cocos/releases/tag/v0.9.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ultravioletrs/cocos/releases/tag/v0.9.0"
        }
      ],
      "source": {
        "advisory": "GHSA-4r6g-mp48-j2rw",
        "discovery": "UNKNOWN"
      },
      "title": "Cocos AI: Intra-handshake attested TLS implementation can accept Evidence with nil, empty, or omitted reportData in the AMD SEV-SNP path"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-92702",
    "datePublished": "2026-09-18T17:02:48.370Z",
    "dateReserved": "2026-09-16T16:22:31.542Z",
    "dateUpdated": "2026-09-18T17:02:48.370Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-92702",
      "date": "2026-09-19",
      "epss": "0.00205",
      "percentile": "0.10896"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "cocos",
                "vendor": "ultravioletrs",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 0.9.0"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Cocos AI is a confidential computing system for running AI workloads inside trusted execution environments. In versions up to and including 0.8.2, the intra-handshake attested TLS (aTLS) AMD SEV-SNP verification path does not enforce attestation freshness when the expected reportData value is nil, empty, or omitted, leaving the SEV-SNP policy ReportData unset so the verifier accepts unrelated or stale Evidence not bound to the current connection. A relying party that uses this path without an expected reportData as a trust or authorization decision can be induced to trust an unintended attestation context; a supplied non-empty reportData is still validated. The issue is fixed in version 0.9.0."
          }
        ],
        "id": "CVE-2026-92702",
        "lastModified": "2026-09-18T18:18:16.257",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 9.1,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.2,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-09-18T18:18:16.257",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/ultravioletrs/cocos/commit/80bf813c48300f02259b338b91f844c71be582ea"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/ultravioletrs/cocos/pull/582"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/ultravioletrs/cocos/releases/tag/v0.9.0"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/ultravioletrs/cocos/security/advisories/GHSA-4r6g-mp48-j2rw"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Received",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-346"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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