{"id":"CVE-2026-112377","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-112377","generatedAt":"2026-10-28T00:57:11.885Z","title":"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.","description":"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.","published":"2026-10-19T18:17:05.000Z","lastModified":"2026-10-20T18:17:18.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":9.1,"severity":"CRITICAL","vector":"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/M"},"cwe":["CWE-346"],"affected":[],"epss":{"score":0.00218,"percentile":0.12156,"date":"2026-10-26","history":[{"date":"2026-10-20","score":0.00178,"percentile":0.06993}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-19T18:17:05.000Z","detail":{"score":"9.1","severity":"CRITICAL","publishedAt":"2026-10-19T18:17:05.490Z"},"summary":"New CVE, critical severity (CVSS 9.1)."}],"references":[{"url":"https://datatracker.ietf.org/doc/draft-intra-handshake-fail/","source":"disclosure@vulncheck.com"},{"url":"https://github.com/CCC-Attestation/attested-tls-poc","source":"disclosure@vulncheck.com"},{"url":"https://github.com/CCC-Attestation/attested-tls-poc/pull/58","source":"disclosure@vulncheck.com"},{"url":"https://github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formal","source":"disclosure@vulncheck.com"},{"url":"https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436","source":"disclosure@vulncheck.com"},{"url":"https://github.com/muhammad-usama-sardar/intra-handshake.fail","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack","source":"disclosure@vulncheck.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-112377","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}