Vulnerability-Lookup

GHSA-HQRH-QQ2R-6H96

Vulnerability from github – Published: 2026-10-19 18:32 – Updated: 2026-10-19 18:32

Details

CCC Attestation SIG attested-tls-poc through commit 731ca82 fails to bind early attestation Evidence to the TLS connection, allowing attackers to relay valid Evidence from a genuine attester. Attackers holding an extracted attested TLS private key can forward the relying party's nonce to a genuine attester and replay its Evidence to impersonate the attested workload and intercept data.

Severity

7.4 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

9.1 (Critical)


                  
                    CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-112377"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-346"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-19T18:17:05Z",
    "severity": "CRITICAL"
  },
  "details": "CCC Attestation SIG attested-tls-poc through commit 731ca82 fails to bind early attestation Evidence to the TLS connection, allowing attackers to relay valid Evidence from a genuine attester. Attackers holding an extracted attested TLS private key can forward the relying party\u0027s nonce to a genuine attester and replay its Evidence to impersonate the attested workload and intercept data.",
  "id": "GHSA-hqrh-qq2r-6h96",
  "modified": "2026-10-19T18:32:17Z",
  "published": "2026-10-19T18:32:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112377"
    },
    {
      "type": "WEB",
      "url": "https://github.com/CCC-Attestation/attested-tls-poc/pull/58"
    },
    {
      "type": "WEB",
      "url": "https://datatracker.ietf.org/doc/draft-intra-handshake-fail"
    },
    {
      "type": "WEB",
      "url": "https://github.com/CCC-Attestation/attested-tls-poc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formal"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436"
    },
    {
      "type": "WEB",
      "url": "https://github.com/muhammad-usama-sardar/intra-handshake.fail"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-112377 (GCVE-0-2026-112377)

Vulnerability from cvelistv5 – Published: 2026-10-19 17:26 – Updated: 2026-10-20 17:39 Unsupported When Assigned

Title

CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack

Summary

Severity

9.1 (Critical)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

7.4 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-20 17:39 UTC

CWE

CWE-346 - Origin Validation Error

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6614 records in the last 180 days details

References

7 references

URL	Tags
https://github.com/CCC-Attestation/attested-tls-p…	patchtechnical-descriptionissue-tracking
https://github.com/CCC-Attestation/attested-tls-p…	technical-description
https://github.com/ionut-arm/mbedtls/blob/f4ac759…	technical-description
https://datatracker.ietf.org/doc/draft-intra-hand…	technical-description
https://github.com/muhammad-usama-sardar/intra-ha…	technical-description
https://github.com/CCC-Attestation/attested-tls-poc	product
https://www.vulncheck.com/advisories/ccc-attestat…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
CCC-Attestation	attested-tls-poc	Affected: 0 , ≤ 731ca82ed533fc7a1092be980887ae2e34261da2 (git)

Date Public

2026-07-17 00:00

Credits

Muhammad Usama Sardar

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-112377",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-20T17:39:34.340105Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-20T17:39:42.185Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://github.com/CCC-Attestation/attested-tls-poc",
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/ccc-attestation/attested-tls-poc",
          "product": "attested-tls-poc",
          "repo": "https://github.com/CCC-Attestation/attested-tls-poc",
          "vendor": "CCC-Attestation",
          "versions": [
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              "status": "affected",
              "version": "0",
              "versionType": "git"
            }
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        }
      ],
      "metrics": [
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            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 9.1,
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            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
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            "vulnIntegrityImpact": "HIGH"
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          "cvssV3_1": {
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            "confidentialityImpact": "HIGH",
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            "userInteraction": "NONE",
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          "url": "https://github.com/CCC-Attestation/attested-tls-poc"
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          "url": "https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack"
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    "datePublished": "2026-10-19T17:26:39.111Z",
    "dateReserved": "2026-10-19T16:30:42.240Z",
    "dateUpdated": "2026-10-20T17:39:42.185Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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