CVE-2026-115845 - Incomplete validation in the run_script Python sandbox in AWS MCP Server
Bulletin ID: 2026-149-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 10/23/2026 12:00 PM PDT Description: AWS MCP Server is a managed server that gives AI agents access to AWS through the Model Context Protocol (MCP), including a run_script tool that runs Python scripts in a sandboxed environment. We identified CVE-2026-115845, an issue in the Python code validator of the run_script tool in AWS MCP Server. An incomplete list of disallowed inputs might allow an authenticated remote user to execute arbitrary code within their own isolated session environment via a crafted script. Impacted versions: N/A (managed service, exclusively hosted) Please refer to the art
Read at AWS Security Bulletins
- Vendor
- Amazon Web Services, Anthropic
- Product
- Claude, AI / LLM tooling
- Exposure class
- AI infrastructure
Why it ranks 25 (Notable)
- Product class: AI infrastructure
- Widely deployed vendor product (Amazon Web Services)
- Covered by 2 independent sources
- Vendor security advisory
- Recency: items published within 24 hours gain 15, within 72 hours 6, within 7 days 2.
Links
- AWS Security Bulletins (aws.amazon.com)
- CVE-2026-115845 on this site · NVD · CVE.org · Vulnpedia
Related coverage
Other items that share a CVE or were clustered with this one.