What’s Vulnerable › Vulnerabilities

CVE-2026-92701: Cocos AI: Intra-handshake attested TLS implementation is vulnerable to session-misbinding attacks for Intel TDX verifier path

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% 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, VerifTeeAttestation in the Intel TDX aTLS verifier receives an expected current-session value but does not apply it to TdQuoteBodyPolicy.ReportData before validating TDX QuoteV4 evidence. The verifier can consequently accept structurally valid evidence containing mismatched or reused REPORT_DATA for the current TLS session, causing the relying party to release application data or make a trust or authorization decision for an unrelated 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/releases/tag/v0.9.0
• https://github.com/ultravioletrs/cocos/security/advisories/GHSA-4px3-wj2x-xx47
• https://github.com/ultravioletrs/cocos/security/advisories/GHSA-4px3-wj2x-xx47

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