{"id":"CVE-2026-108266","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-108266","generatedAt":"2026-10-28T02:24:48.847Z","title":"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.","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.","published":"2026-10-09T21:17:05.000Z","lastModified":"2026-10-16T16:00:34.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":9.1,"severity":"CRITICAL","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-346"],"affected":[],"epss":{"score":0.00117,"percentile":0.01673,"date":"2026-10-26","history":[{"date":"2026-10-10","score":0.00117,"percentile":0.0156}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-09T21:17:05.000Z","detail":{"score":"9.1","severity":"CRITICAL","publishedAt":"2026-10-09T21:17:05.023Z"},"summary":"New CVE, critical severity (CVSS 9.1)."}],"references":[{"url":"https://github.com/Privasys/rustls/commit/ab630583b58fee84260cbbfe2f4a8b45d8bde200","source":"security-advisories@github.com"},{"url":"https://github.com/Privasys/rustls/releases/tag/privasys-v0.8.1","source":"security-advisories@github.com"},{"url":"https://github.com/Privasys/rustls/security/advisories/GHSA-j6qv-435v-r492","source":"security-advisories@github.com"},{"url":"https://privasys.org/blog/binding-attestation-to-the-tls-session","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-108266","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}