CVE-2026-112377

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://datatracker.ietf.org/doc/draft-intra-handshake-fail/
https://github.com/CCC-Attestation/attested-tls-poc
https://github.com/CCC-Attestation/attested-tls-poc/pull/58
https://github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formal
https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436
https://github.com/muhammad-usama-sardar/intra-handshake.fail
https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack

Configurations

No configuration.

History

19 Oct 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-19 18:17

Updated : 2026-10-20 18:17

NVD link : CVE-2026-112377

Mitre link : CVE-2026-112377

CVE.ORG link : CVE-2026-112377

JSON object : View

Products Affected

No product.

CWE

CWE-346

Origin Validation Error

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