CVE-2026-119344 PUBLISHED

Cocos Intra-handshake attested TLS implementation is vulnerable to Diversion Attacks

Assigner: GitHub_M
Reserved: 29.10.2026 Published: 05.11.2026 Updated: 05.11.2026

Cocos AI is a confidential computing system for AI. In version 0.8.2 and earlier, Cocos AI accepts trusted execution environment attestation Evidence when firmware patch levels and software measurements match, without binding the Evidence to an allowed platform owner or unique machine identity and without enforcing revocation. A remote attacker who controls or compromises another platform trusted by the same verifier can substitute valid Evidence from that platform and cause authorization of the wrong platform. This vulnerability is addressed in 0.9.0. However, this vulnerability can't be patched in source code alone, since the vulnerability arises from the confidential computing threat model itself.

Metrics

CVSS Vector: 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
CVSS Score: 9.1

Product Status

Vendor ultravioletrs
Product cocos
Versions
  • Version <= 0.8.2 is affected

References

Problem Types

  • CWE-346: Origin Validation Error CWE