CVE-2026-112377
7.4, highCCC Attestation SIG attested-tls-poc through commit 731ca82 fails to bind early attestation Evidence to the TLS connection, allowing…
- CVSS
- 7.4, high high CVSS v3.1
- EPSS, next 30 days
- n/a
- Exploitation
- No public evidence
- Published
- 19 Oct 2026yesterday
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.
Details
- Vendor
- CCC-Attestation
- Product
- attested-tls-poc
- Weakness
- CWE-346 (opens in a new tab)
- Status
- Deferred
- Updated
- 19 Oct 2026
- Assigner
- disclosure@vulncheck.com
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
References 7
Patches and fixes 1
Other references 6
- datatracker.ietf.org /doc/draft-intra-handshake-fail/ (opens in a new tab)
- github.com /CCC-Attestation/attested-tls-poc (opens in a new tab)
- github.com /CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formal (opens in a new tab)
- github.com /ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436 (opens in a new tab)
- github.com /muhammad-usama-sardar/intra-handshake.fail (opens in a new tab)
- vulncheck.com /advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack (opens in a new tab)
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Beyond this page
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Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 20 Oct 2026, not the live upstream state.