Critical 9.1Published Oct 9, 2026

CVE-2026-108266Privasys rustls fork: RA-TLS challenge mode did not bind attestation evidence to the TLS session

Updated under an hour ago (2026-10-19 08:30 UTC)

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It affects Privasys rustls. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.12%, higher than 2% of scored CVEs.

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Every CVE for Privasys rustls

Exploited in the last 30 days

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.

CVSS: 9.1 CRITICAL (v4.0, CNA)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
Weakness (CWE): CWE-346
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.12% (percentile 2)
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Privasys rustls privasys:rustls (from the name)	before privasys-v0.8.1	CNA record

References

https://github.com/Privasys/rustls/security/advisories/GHSA-j6qv-435v-r492x-refsource-confirm
https://github.com/Privasys/rustls/commit/ab630583b58fee84260cbbfe2f4a8b45d8bde200x-refsource-misc
https://github.com/Privasys/rustls/releases/tag/privasys-v0.8.1x-refsource-misc
https://privasys.org/blog/binding-attestation-to-the-tls-sessionx-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.