{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-129092", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-13T15:08:47.490Z", "datePublished": "2026-11-13T15:11:13.522Z", "dateUpdated": "2026-11-13T15:11:13.522Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-13T15:11:13.522Z"}, "datePublic": "2026-10-17T00:00:00.000Z", "title": "CCC Attestation SIG attested-tls-poc through commit 731ca82 TOCTOU via Handshake-Only Attestation", "descriptions": [{"lang": "en", "value": "CCC Attestation SIG attested-tls-poc through commit 731ca82 contains a time-of-check time-of-use vulnerability because Evidence is appraised only once during the TLS handshake, without post-handshake re-attestation. Attackers with local access to the attesting endpoint can alter workload code, data, configuration, or attached devices like GPUs while peers keep trusting the original Evidence."}], "tags": ["unsupported-when-assigned"], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Time-of-check Time-of-use (TOCTOU) Race Condition", "cweId": "CWE-367", "type": "CWE"}]}], "affected": [{"vendor": "CCC-Attestation", "product": "attested-tls-poc", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThanOrEqual": "731ca82ed533fc7a1092be980887ae2e34261da2", "status": "affected", "versionType": "git"}], "packageURL": "pkg:github/ccc-attestation/attested-tls-poc", "collectionURL": "https://github.com/CCC-Attestation/attested-tls-poc", "repo": "https://github.com/CCC-Attestation/attested-tls-poc"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N", "attackVector": "LOCAL", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE", "baseScore": 5.7, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://doi.org/10.1145/3779208.3785387", "tags": ["technical-description"]}, {"url": "https://github.com/CCC-Attestation/formal-spec-id-crisis", "tags": ["technical-description"]}, {"url": "https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436", "tags": ["technical-description"]}, {"url": "https://github.com/CCC-Attestation/attested-tls-poc", "tags": ["product"]}, {"name": "VulnCheck Advisory: CCC Attestation SIG attested-tls-poc through commit 731ca82 TOCTOU via Handshake-Only Attestation", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-toctou-via-handshake-only-attestation"}], "credits": [{"lang": "en", "value": "Muhammad Usama Sardar", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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