CVE-2026-92702CWE-346

CVE-2026-92702

Critical · published September 18, 2026

CVSS v3.1
9.1
EPSS
0%
Percentile
16.5
In the wild
Unconfirmed
What it is

Cocos AI is a confidential computing system for AI. In Cocos AI 0.8.2 and earlier, VerifyAttestationReportTLS in the AMD SEV-SNP verifier sets Policy.ReportData only when its caller supplies non-empty expected reportData. A relying-party integration that passes nil or empty expected reportData while relying on that value for current-session freshness can therefore accept SEV-SNP evidence unrelated to the current connection and make a trust, authorization, or application-data release decision for an unintended attestation context. This issue was fixed in Cocos AI 0.9.0 by removing the affected verifier path as part of the migration to post-handshake attestation.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00258 · 16.5th percentile
Weakness
CWE-346 · Origin Validation Error
Published
2026-09-18T22:18Z
References (5)
EPSS history
Timeline
  • 20 SEP 03:24Z
    EPSS moved — → 0%
    epss
  • 18 SEP 17:02Z
    Cocos AI: Intra-handshake attested TLS implementation can accept Evidence with nil, empty, or omitted reportData in the AMD SEV-SNP path
    cvelistv5