CVE-2026-119345

Cocos AI Intra-handshake attested TLS implementation is vulnerable to TOCTOU Attacks

Published Nov 5, 2026 CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-ghwv-vrp2-2975 Cocos AI Intra-handshake attested TLS implementation is vulnerable to TOCTOU Attacks
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Ultravioletrs
Ultravioletrs cocos
Vendors & Products Ultravioletrs
Ultravioletrs cocos
Type Values Removed Values Added
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.
Title Cocos AI Intra-handshake attested TLS implementation is vulnerable to TOCTOU Attacks
Weaknesses CWE-367
References
Metrics cvssV4_0

{'score': 7.2, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Nov 5, 2026, 8:40 PM
Reserved
Oct 29, 2026, 8:44 PM
Status
Deferred
Published
Nov 5, 2026, 4:17 PM
Modified
Nov 12, 2026, 10:18 PM