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VULNERABILITIES

CVE-2026-87913 Details

Description

A missing S3 bucket ownership verification in the AWS Security Agent MCP server before 0.2.0 version might allow remote attackers to obtain the private source archive of a scanned workspace, including credentials and infrastructure state contained in that archive, via a pre-registered storage bucket whose name is derived from a publicly known account identifier. To remediate this issue, users should upgrade to version 0.2.0. Users should also verify that the scan output bucket in their account is owned by their own account, because upgrading does not release a bucket name that a third party has already registered.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: AMZNCVSS-B:5.9 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-105-aws/ AMZN
https://github.com/awslabs/mcp/security/advisories/GHSA-3jxw-vj8m-8x77 AMZN
https://pypi.org/project/awslabs.security-agent-mcp-server/0.2.0/?refid=d8ec3b19-0f37-4f8c-8c12-189f913e205c AMZN

Weakness Enumeration

CWE-IDCWE NameSource
CWE-283Unverified OwnershipAMZN
CWE-341Predictable from Observable StateAMZN

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-87913
NVD Published Date:
Sep 10, 2026
NVD Last Modified:
Sep 10, 2026
Source:
AMZN
CVE-2026-87913 Details - Not Deferred