CVE-2026-112377CWE-346

CVE-2026-112377

High · published October 19, 2026

CVSS v3.1
7.4
EPSS
0%
Percentile
7.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.4 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
9.1 · CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00178 · 7.0th percentile
Weakness
CWE-346 · Origin Validation Error
Published
2026-10-19T22:17Z
References (7)
https://datatracker.ietf.org/doc/draft-intra-handshake-fail/ · [email protected]https://github.com/CCC-Attestation/attested-tls-poc · [email protected]https://github.com/CCC-Attestation/attested-tls-poc/pull/58 · [email protected]https://github.com/CCC-Attestation/attested-tls-poc/tree/5b6c5374b3fe8b671906c8ab32f6134d9c3da26d/relay-attacks-formal · [email protected]https://github.com/ionut-arm/mbedtls/blob/f4ac7593826a506fc509c83cad73786acab1d442/library/ssl_tls13_generic.c#L430-L436 · [email protected]https://github.com/muhammad-usama-sardar/intra-handshake.fail · [email protected]https://www.vulncheck.com/advisories/ccc-attestation-sig-attested-tls-poc-through-commit-731ca82-attestation-relay-attack · [email protected]
EPSS history
Timeline
  • 21 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 19 OCT 17:26Z
    CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack
    cvelistv5
  • 19 OCT 17:26Z
    CCC Attestation SIG attested-tls-poc through commit 731ca82 Attestation Relay Attack
    cvelistv5