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TI-2026-70302 Aliases CVE-2026-108269

RA-TLS challenge verifier in ra-tls-clients accepts relayed quotes

Priority LOW 38CWE-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
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-346.

Summary

Privasys ra-tls-clients before 0.5.0 has Rust and Go RA-TLS challenge verifiers that accept quote report data bound to the certificate key and client nonce but not to the active TLS session (CWE-346). An attacker who obtains an enclave TLS private key can relay a genuine quote onto another connection. The clients then accept the attacker-terminated connection as the attested enclave.

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

Description from the CNA

Remote Attestation TLS Clients provides multi-language utilities for verifying attested TLS connections. Prior to 0.5.0, the Rust and Go RA-TLS challenge verifiers accepted quote ReportData that was bound to the certificate public key and client nonce but not to the active TLS session before permitting application traffic. An attacker who obtained an enclave TLS private key could relay a genuine quote onto another connection, causing the clients to accept an attacker-terminated connection as the attested enclave. This issue is fixed in 0.5.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00128 2nd percentileScored 2026-11-07
Fix Fixed ra-tls-clients (Privasys): 0.5.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
Privasysra-tls-clientsbefore 0.5.00.5.0Patch availableCNA
  • ra-tls-clients VendorPrivasys Affected before 0.5.0 Fixed in 0.5.0 Patch available CNA

Remediation

Upgrade Privasys ra-tls-clients to 0.5.0, which fixes this issue.

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

  • Fix · CNA ra-tls-clients (Privasys) Fixed in 0.5.0

Timeline

  1. 2026-10-10 Threatist record created from CVE-2026-108269
  2. 2026-10-11 Priority changed: MEDIUM → LOW
  3. 2026-10-13 CISA SSVC decision points changed

References

Other 4

  • 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-2026-70301 Privasys enclave-os-virtual RA-TLS quotes not bound to TLS session 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-2026-71257 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