CVE-2026-112377
HIGH
CVSS 7.4
Published: 2026-10-19
Modified: 2026-10-20
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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.
Quick Facts
| CVE ID | CVE-2026-112377 |
| CVSS Score | 7.4 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| Published | 2026-10-19 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |
References
- 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/5b6…
- https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc5…
- https://github.com/muhammad-usama-sardar/intra-handshake.fai…
- https://www.vulncheck.com/advisories/ccc-attestation-sig-att…