CVE-2026-92701 PUBLISHED

Cocos AI: Intra-handshake attested TLS implementation is vulnerable to session-misbinding attacks for Intel TDX verifier path

Assigner: GitHub_M
Reserved: 16.09.2026 Published: 18.09.2026 Updated: 18.09.2026

trusted execution environments. In versions up to and including 0.8.2, the intra-handshake attested TLS (aTLS) Intel TDX verification path does not copy the expected current-session freshness value into the TDX quote-body policy before quote validation, so structurally valid TDX QuoteV4 Evidence is accepted without checking that its REPORT_DATA field matches the reportData expected for the current session. A relying party using this path can therefore accept Evidence with a mismatched or reused reportData and release application data after the handshake, enabling session-misbinding to an unintended attestation context. The issue is fixed in version 0.9.0.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 9.1

Product Status

Vendor ultravioletrs
Product cocos
Versions
  • Version < 0.9.0 is affected

References

Problem Types

  • CWE-346: Origin Validation Error CWE
  • CWE-354: Improper Validation of Integrity Check Value CWE