Critical

ra-tls-clients: RA-TLS challenge verifier accepted quotes not bound to the TLS session

Type: advisorySources: OSV

Remote Attestation TLS Clients provides multi-language utilities for verifying attested TLS connections. Prior to 0.5.0, the Rust and Go RA-TLS challenge verifiers accepted quote ReportData that was bound to the certificate public key and client nonce but not to the active TLS session before permitting application traffic. An attacker who obtained an enclave TLS private key could relay a genuine quote onto another connection, causing the clients to accept an attacker-terminated connection as the attested enclave. This issue is fixed in 0.5.0.

Products: Not specified
Affected versions: Not specified
Fixed versions: Not specified
CVEs: CVE-2026-108269
Confirmed fixed CVEs: Not specified
Updated in this feed: 4 Nov 2026, 23:59 UTC · Revision 1

Source evidence

ra-tls-clients: RA-TLS challenge verifier accepted quotes not bound to the TLS session

core-osv · Original source

Published 9 Oct 2026, 21:15 UTC

osv:CVE-2026-108269

Complete source record

{
  "id": "4d81b9bcbaca0eb1a0571580a9897fec43bf05ff0ff64ac5ce69dca88b224ee5",
  "url": "https://osv.dev/vulnerability/CVE-2026-108269",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ra-tls-clients: RA-TLS challenge verifier accepted quotes not bound to the TLS session",
    "summary": "Remote Attestation TLS Clients provides multi-language utilities for verifying attested TLS connections. Prior to 0.5.0, the Rust and Go RA-TLS challenge verifiers accepted quote ReportData that was bound to the certificate public key and client nonce but not to the active TLS session before permitting application traffic. An attacker who obtained an enclave TLS private key could relay a genuine quote onto another connection, causing the clients to accept an attacker-terminated connection as the attested enclave. This issue is fixed in 0.5.0.",
    "evidence": "osv:CVE-2026-108269",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-108269",
      "aliases": [
        "CVE-2026-108269",
        "GHSA-5qrc-v874-mxvx"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/privasys/ra-tls-clients",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b8de9bcadd0f81ca8882d15095fc0d9c50e40148"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.5.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b8de9bcadd0f81ca8882d15095fc0d9c50e40148"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b8de9bcadd0f81ca8882d15095fc0d9c50e40148"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.5.0"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.5.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.4.9",
            "v0.4.8",
            "v0.4.7",
            "v0.4.6",
            "v0.4.5",
            "v0.4.4",
            "v0.4.3",
            "v0.4.2",
            "v0.4.1",
            "v0.4.0",
            "v0.3.0",
            "v0.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-108269.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:40.398884269Z",
      "provider": "osv",
      "references": [
        "https://github.com/Privasys/ra-tls-clients/releases/tag/v0.5.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108269.json",
        "https://github.com/Privasys/ra-tls-clients/security/advisories/GHSA-5qrc-v874-mxvx",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-108269",
        "https://github.com/Privasys/ra-tls-clients/commit/b8de9bcadd0f81ca8882d15095fc0d9c50e40148",
        "https://privasys.org/blog/binding-attestation-to-the-tls-session"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-346"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108269.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-108269",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 508186,
  "published_at": "2026-10-09T21:15:12.264+00:00"
}