Critical severity · published Oct 6, 2026
CVE-2026-105812
Code injection via unencoded configuration values during Python code generation in Bedrock AgentCore Starter Toolkit agent import
9.0
CVSS
0.3%
EPSS
No
On KEV
Description
Improper control of code generation in the agent import functionality of Amazon Bedrock AgentCore Starter Toolkit before 0.3.14 might allow an authenticated same-account actor to execute arbitrary code when a user imports and runs or deploys a Bedrock Agent, via crafted configuration values incorporated into generated Python source without safe literal encoding.
To remediate this issue, users should upgrade to version 0.3.14. Because this issue persists into generated source, upgrading alone is not sufficient: agents imported with an affected version must be re-imported with version 0.3.14 or later and their local and deployed output artifacts replaced.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BE
bedrock-agentcore-starter-toolkit · aws
0.1.4 through 0.3.13 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105812
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-105812
patch
https://pypi.org/project/bedrock-agentcore-starter-toolkit/0.3.14/
vendor-advisory
https://aws.amazon.com/security/security-bulletins/2026-127-aws/
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