CVE-2026-112377
CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack
CVSS Score
7.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-346 |
| Vendor | ccc-attestation |
| Product | attested-tls-poc |
| Published | Oct 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
CCC-Attestation / attested-tls-poc
0 ≤ 731ca82ed533fc7a1092be980887ae2e34261da2
References
github.com: https://github.com/CCC-Attestation/attested-tls-poc/pull/58 github.com: https://github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formal github.com: https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436 datatracker.ietf.org: https://datatracker.ietf.org/doc/draft-intra-handshake-fail/ github.com: https://github.com/muhammad-usama-sardar/intra-handshake.fail github.com: https://github.com/CCC-Attestation/attested-tls-poc vulncheck.com: https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack
Credits
Muhammad Usama Sardar