CVE-2026-108266 PUBLISHED

Privasys rustls fork: RA-TLS challenge mode did not bind attestation evidence to the TLS session

Assigner: GitHub_M
Reserved: 09.10.2026 Published: 09.10.2026 Updated: 09.10.2026

Privasys rustls is a maintained fork of the rustls TLS library that adds RA-TLS challenge and channel-binding support. Prior to privasys-v0.8.1, the fork emitted RA-TLS challenge certificates whose quote ReportData was bound to the certificate public key and client nonce but not 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 privasys-v0.8.1.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 9.1

Product Status

Vendor Privasys
Product rustls
Versions
  • Version < privasys-v0.8.1 is affected

References

Problem Types

  • CWE-346: Origin Validation Error CWE