Vulnerability in Amazon bedrock-agentcore (CVE-2026-16796)
Summary
Vulnerability in Amazon bedrock-agentcore (CVE-2026-16796). Confidential information can be exposed externally. Mitigation: upgrade to 1.18.1 or later.
Original description
The description as published by the source.
Summary
The AWS Bedrock AgentCore Python SDK (bedrock-agentcore) provides tools for building AI agents, including a Code Interpreter client that installs Python packages into a managed sandbox. An issue exists where, under certain circumstances, improper neutralization of argument delimiters in the install_packages() method allows a remote authenticated user to execute arbitrary commands within the Code Interpreter sandbox via crafted package name arguments.
Impact
Insufficient input validation in install_packages() allows specially crafted package specifiers to bypass validation and achieve arbitrary command execution within the sandbox. A remote authenticated user who can influence the arguments to install_packages() can execute arbitrary commands within the Code Interpreter sandbox environment.
Impacted Versions
< 1.18.1
Patches
This issue has been addressed in bedrock-agentcore version 1.18.1. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.
Workarounds
If you are not able to upgrade, do not pass untrusted or model-generated input to install_packages(). Applications that must accept dynamic package names should validate them against strict PyPI naming rules -- including constraining any extras group to comma-separated identifiers -- before calling the SDK.
References
If you have any questions or comments about this advisory, AWS asks that you contact AWS Security…
Source: AWS Security Bulletins NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-16796 has been found in Amazon bedrock-agentcore.
Confidential information can be exposed externally. CVSS score: 7.3/10.
What to do: upgrade Amazon bedrock-agentcore to 1.18.1 or later.
If unsure, ask your IT team or search "Amazon bedrock-agentcore CVE-2026-16796" on the vendor's site.
CVE-2026-16796 (Amazon bedrock-agentcore) — CWE-88 / CVSS v3 7.3
Attack vector: remote (network-reachable)
Patched: 1.18.1 — apply immediately
Workaround: If you are not able to upgrade, do not pass untrusted or model-generated input to install_packages().
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-88) exists in Amazon bedrock-agentcore.
Check the vendor advisory for the affected versions of Amazon bedrock-agentcore.
Severity: High (CVSS 7.3/10). Confidential information can be exposed externally.
Update to 1.18.1.
Workaround: If you are not able to upgrade, do not pass untrusted or model-generated input to install_packages().
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'bedrock-agentcore' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'bedrock-agentcore' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
bedrock-agentcoreを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply temporary workaround mitigate
If you are not able to upgrade, do not pass untrusted or model-generated input to install_packages().パッチが適用されるまでの応急処置として、If you are not able to upgrade, do not pass untrusted or model-generated input to install_packages(). を実施。回避策の副作用 (機能低下) を確認した上で。
-
3Apply patch patch
Upgrade Amazon bedrock-agentcore to 1.18.1ステージング環境で 1.18.1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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4Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- advisory github.com
- AWS aws.amazon.com
- package github.com
- package pypi.org
- web aws.amazon.com
- web github.com
- web pypi.org
- web github.com
- web github.com
- web aws.amazon.com
- web pypi.org