Vulnerability · Published Oct 9, 2026 · Assigned by GitHub_M
CVE-2026-108269ra-tls-clients: RA-TLS challenge verifier accepted quotes not bound to the TLS session
Critical 9.1
In plain English
A critical-severity security flaw in ra-tls-clients from Privasys. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Privasys | ra-tls-clients | < 0.5.0 |
Weakness: CWE-346 · 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
References
- https://github.com/Privasys/ra-tls-clients/security/advisories/GHSA-5qrc-v874-mxvx x_refsource_CONFIRM
- https://github.com/Privasys/ra-tls-clients/commit/b8de9bcadd0f81ca8882d15095fc0d9c50e40148 x_refsource_MISC
- https://github.com/Privasys/ra-tls-clients/releases/tag/v0.5.0 x_refsource_MISC
- https://privasys.org/blog/binding-attestation-to-the-tls-session x_refsource_MISC