---
id: CVE-2026-112377
title: >-
  CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay
  Attack
summary: >-
  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 p…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-346
vendor: CCC-Attestation
product: attested-tls-poc
affected:
  - attested-tls-poc <= 731ca82ed533fc7a1092be980887ae2e34261da2
published: '2026-10-19'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T17:26:39.111Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112377'
references:
  - url: 'https://github.com/CCC-Attestation/attested-tls-poc/pull/58'
    label: 'Pull Request #58'
  - url: >-
      https://github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formal
  - url: >-
      https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436
  - url: 'https://datatracker.ietf.org/doc/draft-intra-handshake-fail/'
  - url: 'https://github.com/muhammad-usama-sardar/intra-handshake.fail'
  - url: 'https://github.com/CCC-Attestation/attested-tls-poc'
  - url: >-
      https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack
    label: >-
      VulnCheck Advisory: CCC Attestation SIG attested-tls-poc through commit
      731ca82 Attestation Relay Attack
tags:
  - cve.org
ingestedAt: '2026-10-19T18:35:50.163Z'
---

## Overview

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.

## Affected

- `attested-tls-poc <= 731ca82ed533fc7a1092be980887ae2e34261da2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.