Vulnerability in Ccc-Attestation Attested-Tls-Poc
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/CCC-Attestation/attested-tls-poc/pull/58 (issue-tracking, technical-description, patch)
- github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f613… (technical-description)
- github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/libr… (technical-description)
- datatracker.ietf.org/doc/draft-intra-handshake-fail/ (technical-description)
- github.com/muhammad-usama-sardar/intra-handshake.fail (technical-description)
- github.com/CCC-Attestation/attested-tls-poc (product)
- www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-112377?
- CVE-2026-112377 is a high-severity vulnerability in Ccc-Attestation Attested-Tls-Poc, classified under Origin Validation Error. CVSS score: 7.4/10. Published 2026-10-19.
- How severe is CVE-2026-112377?
- High severity. CVSS v3 base score is 7.4 out of 10.