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TI-2026-70301 Aliases CVE-2026-108268

Privasys enclave-os-virtual RA-TLS quotes not bound to TLS session

Priority MEDIUM 40CWE-346Published · Updated

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

Privasys enclave-os-virtual before tdx-v0.2.43 and before tdx-gpu-v0.6.27 has an origin validation error (CWE-346) in its TDX/GPU RA-TLS certificate issuer. The issuer omits a value bound to the active TLS session from the quote ReportData. An attacker who holds an enclave TLS private key can relay a genuine quote onto another connection, so a relying party accepts the attacker's connection as the attested enclave.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Enclave OS Virtual runs container workloads inside confidential virtual machines with end-to-end attestation. Prior to tdx-v0.2.43 and tdx-gpu-v0.6.27, the TDX/GPU RA-TLS certificate issuer placed the certificate public-key hash and client nonce in quote ReportData but omitted a value bound to the active TLS session. An attacker who obtained an enclave TLS private key could relay a genuine quote onto another connection, causing a relying party to accept an attacker-terminated connection as the attested enclave. This issue is fixed in tdx-v0.2.43 and tdx-gpu-v0.6.27.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00128 2nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Privasysenclave-os-virtual< tdx-v0.2.43; < tdx-gpu-v0.6.27—No fix listedCNA
  • enclave-os-virtual VendorPrivasys Affected < tdx-v0.2.43; < tdx-gpu-v0.6.27 Fixed in — No fix listed CNA

Remediation

Upgrade enclave-os-virtual to tdx-v0.2.43 or tdx-gpu-v0.6.27, the fixed versions named in the source. The sources list no advisory identifier for these fixes.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

  1. 2026-10-10 Threatist record created from CVE-2026-108268
  2. 2026-10-11 Priority changed: MEDIUM → LOW
  3. 2026-10-13 CISA SSVC decision points changed
  4. 2026-10-13 Priority changed: LOW → MEDIUM

References

Other 5

  • TI-2026-70299 Privasys rustls RA-TLS attestation not bound to the TLS session CVSS 4.0CRITICAL 9.1
  • TI-2026-71258 Privasys attested TLS accepts evidence from other TEE platforms CVSS 4.0CRITICAL 9.1
  • TI-2026-70300 Privasys Go RA-TLS attestation not bound to the TLS session CVSS 4.0CRITICAL 9.1
  • TI-2026-70298 enclave-os-mini RA-TLS certificates not bound to TLS session CVSS 4.0CRITICAL 9.1
  • TI-2026-70302 RA-TLS challenge verifier in ra-tls-clients accepts relayed quotes CVSS 4.0CRITICAL 9.1
  • TI-2026-71257 Privasys ra-tls-clients trusts stale attestation after TLS setup CVSS 4.0HIGH 7.2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences