What’s Vulnerable › Vulnerabilities

CVE-2026-92702: Cocos AI: Intra-handshake attested TLS implementation can accept Evidence with nil, empty, or omitted reportData in the AMD SEV-SNP path

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-18 · updated 2026-10-13
• Weakness: CWE-346

Description

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.

Affected products

• ultravioletrs cocos: before 0.9.0

References

• https://github.com/ultravioletrs/cocos/commit/80bf813c48300f02259b338b91f844c71be582ea
• https://github.com/ultravioletrs/cocos/pull/582
• https://github.com/ultravioletrs/cocos/releases/tag/v0.9.0
• https://github.com/ultravioletrs/cocos/security/advisories/GHSA-4r6g-mp48-j2rw
• https://github.com/ultravioletrs/cocos/security/advisories/GHSA-4r6g-mp48-j2rw

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