CVE-2024-41950: Haystack remote code execution through user-created Jinja2 templates

Summary

CVE-2024-41950 affects Haystack clients that let users create and run Pipelines from scratch. Certain Haystack Components use Jinja2 templates, and if an attacker can create and render such a template on the client machine, they can run arbitrary code. The weakness is classified as CWE-1336, Improper Neutralization of Special Elements Used in a Template Engine.

Mitigation

Fixed with Haystack 2.3.1.

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

• haystack-aiPyPILLM dependency since 2023-11-24 · 4 tracked dependents

Related items

• MediumCVE-2026-121936: easyVoice server-side request forgery through openaiBaseUrl in /api/v1/ttsSimilar attack · NVD/CVE Database
• MediumCVE-2026-118628: MLflow get-artifacts server-side request forgery information disclosureSimilar attack · NVD/CVE Database
• HighCVE-2026-118625: MLflow Tracking Server privilege escalation via get_endpointsSimilar attack · NVD/CVE Database
• InfoWhen trust becomes the payload: Inside the threats, etc quarterly reportSimilar attack · Elastic Security Labs
• MediumCritical Langflow flaws enable authentication bypass and RCESimilar attack · CSO Online