# CVE-2026-40693: Intel TDX Workload Attestation Software input validation denial of service

Source: https://junglewise.ai/threats/cve-2026-40693-improper-input-validation-for-some-intel-r-tdx-workload  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-40693 · Severity: medium · CVSS 4 · Published 2026-11-10

Intel TDX Workload Attestation is a software component that validates trusted virtual workloads in Intel's Trusted Domain Extension environments. An authenticated attacker with local access can trigger a denial of service condition through improper input handling, causing the system to become unavailable.

Vendors: [crates.io](https://junglewise.ai/threats/vendors/crates-io), [Intel](https://junglewise.ai/threats/vendors/intel).

## Quick answers

**Is CVE-2026-40693 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-40693 being exploited in the wild.

**How severe is CVE-2026-40693?** Medium severity, with a CVSS score of 4, published 10 November 2026.

**Which products and versions are affected?** tdx_workload_attestation (crates.io) SEMVER:introduced=0.0.0-0,fixed=0.2.0; Intel TDX Workload Attestation before 0.2.0.

**Is there a fix for CVE-2026-40693?** Yes. tdx_workload_attestation (crates.io): upgrade to 0.2.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-40693 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-40693?** Check whether you run tdx_workload_attestation (crates.io) or Intel TDX Workload Attestation at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- tdx_workload_attestation (crates.io): upgrade to 0.2.0 or later

  ```sh
  cargo update -p tdx_workload_attestation
  ```


## Technical details

Improper input validation in the Ring 3 user application component of Intel TDX Workload Attestation allows an authenticated local attacker to trigger a denial of service via a high-complexity attack without user interaction. The vulnerability affects the availability of the vulnerable system with no confidentiality or integrity impact.

## Affected products

- Intel TDX Workload Attestation before 0.2.0

## Identifiers

- CVE-2026-40693
- GHSA-gwf2-8595-qw97
- RUSTSEC-2026-0480

## Timeline

- 2026-11-10: disclosed

## References

- [https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01520.html](https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01520.html)

## Related threats

- [Intel TDX Workload Attestation certificate validation bypass](https://junglewise.ai/threats/cve-2026-42067-improper-certificate-validation-for-some-intel-r-tdx-workload)