Search/CVE-2026-87913
● CVE — Medium

CVE-2026-87913

DiscoveredSep 10, 2026UpdatedSep 10, 2026

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.

CVSS v3.1
5.9 MEDIUM
EPSS
0.44%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
1
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Sep 12, 2026 → Sep 25, 2026
▲ 0.19pp
0.25% → 0.44% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityHIGH
Privileges RequiredNONE
User InteractionREQUIRED
ScopeUNCHANGED
ConfidentialityHIGH
IntegrityLOW
AvailabilityNONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
Connections
3 relationships
Timeline
disclosure → media coverage
Sep 10, 2026
Disclosure — published as a CVE record.
Oct 25, 2026
aws.amazon.com reports: CVE-2026-87912 and CVE-2026-87913: Missing S3 bucket ownership verification in the AWS Security Agent plugin for aws-agents-for-devsecops and MCP Server