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CVE-2026-108361— Privasys Intra-handshake attested TLS implementation is vulnerable to TOCTOU Attacks

Quick assessment

Affected
Privasys ra-tls-clients
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Privasys Remote Attestation TLS 客户端提供多种语言的实用程序，用于验证经过远程证明的 TLS 连接。在版本 0.9.1 之前，具有本地访问权限的攻击者在成功建立连接后，可随时修改工作负载的代码、数据和配置。一旦证据（Evidence）成功完成验证且连接建立，在连接建立到终止之间的整个时间段内都存在漏洞窗口，攻击者可以在作为证明方（Attester）的 TLS 端点运行时，动态修改工作负载和平台的状态。该漏洞之所以存在，是因为 Privasys/ra-tls-clients 仅在连接生

CVSS 7.2 · High EPSS 0.08% · P0

Affected Version Matrix 1

VendorProduct Version RangeStatus
Privasys ra-tls-clients < 0.9.1 affected
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I. Basic Information for CVE-2026-108361

Vulnerability Information
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Vulnerability Title
Privasys Intra-handshake attested TLS implementation is vulnerable to TOCTOU Attacks
Source: CVE Program / CVE List V5
Vulnerability Description
Privasys Remote Attestation TLS Clients provides multi-language utilities for verifying attested TLS connections. Before 0.9.1, an attacker with local access could modify workload code, data, and configuration at any time after successful connection establishment. Once Evidence was successfully appraised and the connection was established, there was a window of vulnerability from the establishment of the connection to the termination of the connection where an attacker could modify the state of the workload and platform at runtime on the TLS endpoint acting as the Attester. This vulnerability was possible because Privasys/ra-tls-clients performed attestation only once in the lifetime of the connection (at connection establishment time), and the verifying peer continued to believe that the state was the same as in the initial Evidence throughout, whereas it could be stale at some point in time. This vulnerability is fixed in 0.9.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Privasys ra-tls-clients < 0.9.1 -

II. Public POCs for CVE-2026-108361

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III. Intelligence Information for CVE-2026-108361

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Vendor Advisories for CVE-2026-108361 (1)

IV. Related Vulnerabilities

Same product: ra-tls-clients
Same vendor: Privasys
Same weakness: CWE-367

V. Comments for CVE-2026-108361

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