> CVE-2026-87913 [MEDIUM]

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PUBLISHED
2026-09-10 16:18
MODIFIED
2026-09-10 16:18
CVSS_SCORE V3
5.1
EPSS (Prob. Exploit)
0.44%
Top 63.1%
DATA SOURCES:
NVD đź”— 2026-09-10 CWE MITRE đź”— 2026-10-01 FIRST EPSS đź”— 2026-10-18

> 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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
Unknown (P)
Interaction inconnue
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-283 CWE-341

> CWE DETAILED DESCRIPTIONS

CWE-283: Unverified Ownership - The product does not properly verify that a critical resource is owned by the proper entity. | CWE-341: Predictable from Observable State - A number or object is predictable based on observations that the attacker can make about the state of the system or network, such as time, process ID, etc.

> HISTORIQUE DES MODIFICATIONS

Première apparition
10/09/2026 16:18
Source: NVD
📊 ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-283: Unverified Ownership - The product does not properly verify that a critical resource is owned by the proper entity. | CWE-341: Predictable from Observable State - A number or object is predic...
Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://aws.amazon.com/security/security-bulletins/2026-105-aws/
https://github.com/awslabs/mcp/security/advisories/GHSA-3jxw-vj8m-8x77
https://pypi.org/project/awslabs.security-agent-mcp-server/0.2.0/?refid=d8ec3b19...
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