Origin validation error in Cocos AI attestation
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-346.
Summary
The cocos product from ultravioletrs is affected through 0.8.2. Cocos AI accepts attestation evidence when firmware patch levels and software measurements match, without binding it to an allowed platform owner or unique machine identity (CWE-346). An attacker who controls or compromises another platform trusted by the same verifier can substitute valid evidence from that platform and get the wrong platform authorized.
Written with Claude Haiku 5.5 from the sources below · 2026-11-05
Description from the CNA
Cocos AI is a confidential computing system for AI. In version 0.8.2 and earlier, Cocos AI accepts trusted execution environment attestation Evidence when firmware patch levels and software measurements match, without binding the Evidence to an allowed platform owner or unique machine identity and without enforcing revocation. A remote attacker who controls or compromises another platform trusted by the same verifier can substitute valid Evidence from that platform and cause authorization of the wrong platform. This vulnerability is addressed in 0.9.0. However, this vulnerability can't be patched in source code alone, since the vulnerability arises from the confidential computing threat model itself.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ultravioletrs | cocos | up to 0.8.2 | — | No fix listed | CNA |
- cocos Vendorultravioletrs Affected up to 0.8.2 Fixed in — No fix listed CNA
Remediation
Upgrade cocos to version 0.9.0, which addresses this vulnerability. The source description states that this flaw cannot be patched in source code alone because it arises from the confidential computing threat model itself.
Written with Claude Haiku 5.5 from the sources below · 2026-11-05
Timeline
- 2026-11-05 Threatist record created from CVE-2026-119344
- 2026-11-07 Priority changed: MEDIUM → LOW
References
Other 5
- https://github.com/ultravioletrs/cocos/security/advisories/GHSA-v5m8-5wxc-vjgp
- https://dl.acm.org/doi/10.1145/3779208.3785387
- https://doi.org/10.1145/3779208.3785387
- https://github.com/ultravioletrs/cocos/releases/tag/v0.9.0
- https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/technical-documentation/platform-ownership-endorsements.html
More ultravioletrs vulnerabilities
- TI-2026-62478 Origin validation error in ultravioletrs cocos CVSS 3.1CRITICAL 9.1
- TI-2026-62477 Origin validation error in ultravioletrs cocos CVSS 3.1CRITICAL 9.1
- TI-2026-85493 Cocos AI attested TLS vulnerable to TOCTOU attacks after handshake CVSS 4.0HIGH 7.2
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences