---
title: "CVE-2026-108266: Privasys rustls - Man-in-the-Middle"
description: "Privasys rustls before v0.8.1 contains a replay attack vulnerability caused by RA-TLS challenge certificates binding quote ReportData to public key and client nonce but not active TLS session, letting attackers relay genuine quotes to impersonate attested enclaves, exploit requires attacker to obtain enclave TLS private key."
url: https://panop.io/threat-heartbeat/CVE-2026-108266/
---

# CVE-2026-108266 Privasys rustls - Man-in-the-Middle

Privasys rustls before v0.8.1 contains a replay attack vulnerability caused by RA-TLS challenge certificates binding quote ReportData to public key and client nonce but not active TLS session, letting attackers relay genuine quotes to impersonate attested enclaves, exploit requires attacker to obtain enclave TLS private key.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

EPSS

0.12% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-108266)

## Details

Type

Man-in-the-Middle

Impact

Man In The Middle

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

9 October 2026

Updated

15 October 2026

Weakness

[CWE-346](https://cwe.mitre.org/data/definitions/346.html)

## Vendor fix

Update to version privasys-v0.8.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-108266](https://nvd.nist.gov/vuln/detail/CVE-2026-108266)
- [https://github.com/Privasys/rustls/releases/tag/privasys-v0.8.1](https://github.com/Privasys/rustls/releases/tag/privasys-v0.8.1)
- [https://github.com/Privasys/rustls/security/advisories/GHSA-j6qv-435v-r492](https://github.com/Privasys/rustls/security/advisories/GHSA-j6qv-435v-r492)
- [https://privasys.org/blog/binding-attestation-to-the-tls-session](https://privasys.org/blog/binding-attestation-to-the-tls-session)
- [https://github.com/Privasys/rustls/commit/ab630583b58fee84260cbbfe2f4a8b45d8bde200](https://github.com/Privasys/rustls/commit/ab630583b58fee84260cbbfe2f4a8b45d8bde200)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)