Security Scan Flags Critical CVE-2026-32274 in ai-chat-assistant's Black Formatter

A routine security audit has exposed a critical vulnerability within the development pipeline of the `ai-chat-assistant` service. The `pip-audit` tool flagged a known security flaw, CVE-2026-32274, in the pinned version of the `black` code formatter (`24.10.0`). This vulnerability was discovered during a scan of pull request #1555 but is confirmed to have been pre-existing on the `main` branch, indicating a latent security gap in the project's development environment.

The affected component, `black`, is strictly a development-time tool used for formatting Python source code. This significantly limits the immediate blast radius; the CVE poses a **developer-machine-only** risk and does not threaten the production runtime of the `ai-chat-assistant` service itself. However, the finding underscores a deeper procedural issue: the formatter is incorrectly listed in the service's main `requirements.txt` file instead of being isolated in a development-only dependency file like `requirements-dev.txt`. This misplacement potentially exposes more systems to the vulnerability than necessary.

While the operational urgency is lower than for a runtime dependency, the presence of a known CVE in any project artifact demands remediation. The suggested fixes highlight a path forward, with the preferred option being to not only upgrade `black` to the patched version `26.3.1` but to also architecturally separate development and production dependencies. This incident serves as a pointed reminder that security hygiene must extend beyond production code to encompass the entire toolchain and development workflow, where overlooked dependencies can create soft targets for exploitation.