{"id":"CVE-2026-112377","title":"CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack","summary":"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 p…","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","cvssSource":"cna","cwe":["CWE-346"],"vendor":"CCC-Attestation","product":"attested-tls-poc","affected":["attested-tls-poc <= 731ca82ed533fc7a1092be980887ae2e34261da2"],"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T17:26:39.111Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112377","references":[{"url":"https://github.com/CCC-Attestation/attested-tls-poc/pull/58","label":"Pull Request #58"},{"url":"https://github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formal"},{"url":"https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436"},{"url":"https://datatracker.ietf.org/doc/draft-intra-handshake-fail/"},{"url":"https://github.com/muhammad-usama-sardar/intra-handshake.fail"},{"url":"https://github.com/CCC-Attestation/attested-tls-poc"},{"url":"https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack","label":"VulnCheck Advisory: CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack"}],"tags":["cve.org"],"ingestedAt":"2026-10-19T18:35:50.163Z","slug":"CVE-2026-112377","body":"## Overview\n\nCCC 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.\n\n## Affected\n\n- `attested-tls-poc <= 731ca82ed533fc7a1092be980887ae2e34261da2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}