CVE-2026-108266

critical

Description

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.

References

https://privasys.org/blog/binding-attestation-to-the-tls-session

https://github.com/Privasys/rustls/security/advisories/GHSA-j6qv-435v-r492

https://github.com/Privasys/rustls/releases/tag/privasys-v0.8.1

https://github.com/Privasys/rustls/commit/ab630583b58fee84260cbbfe2f4a8b45d8bde200

Details

Source: Mitre, NVD

Published: 2026-10-09

Updated: 2026-10-09

Risk Information

CVSS v2

Base Score: 5.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Severity: High

CVSS v4

Base Score: 9.1

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

Severity: Critical