Vulnerability in Ultravioletrs Cocos

CVE-2026-92701

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.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-92701?
CVE-2026-92701 is a critical-severity vulnerability in Ultravioletrs Cocos, classified under Origin Validation Error. CVSS score: 9.1/10. Published 2026-09-18.
How severe is CVE-2026-92701?
Critical severity. CVSS v3 base score is 9.1 out of 10.