{"id":"CVE-2026-112377","summary":"CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack","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.","modified":"2026-10-20T02:45:29.468027023Z","published":"2026-10-19T17:26:39.111Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112377.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-346"]},"references":[{"type":"ARTICLE","url":"https://datatracker.ietf.org/doc/draft-intra-handshake-fail/"},{"type":"PACKAGE","url":"https://github.com/CCC-Attestation/attested-tls-poc"},{"type":"FIX","url":"https://github.com/CCC-Attestation/attested-tls-poc/pull/58"},{"type":"ARTICLE","url":"https://github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formal"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112377.json"},{"type":"ARTICLE","url":"https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436"},{"type":"ARTICLE","url":"https://github.com/muhammad-usama-sardar/intra-handshake.fail"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112377"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/CCC-Attestation/attested-tls-poc","events":[{"introduced":"0"},{"last_affected":"731ca82ed533fc7a1092be980887ae2e34261da2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112377.json"}}],"schema_version":"1.9.0","severity":[{"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"}]}