> CVE-2026-55521 [HIGH]

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PUBLISHED
2026-08-28 20:18
MODIFIED
2026-08-28 20:18
CVSS_SCORE V3
8.8
EPSS (Prob. Exploit)
0.52%
Top 56.4%
DATA SOURCES:
NVD đź”— 2026-08-28 CWE MITRE đź”— 2026-09-01 FIRST EPSS đź”— 2026-10-25 GITHUB đź”— 2026-10-29 OSV đź”— 2026-08-31

> DESCRIPTION

Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs omits authorization checks in IndexesApi.listPacketIndex, IndexesApi.listEventIndex, Cop1Api.disable, Cop1Api.resume, Cop1Api.initialize, Cop1Api.updateConfig, and TimeApi.setTime. An authenticated low-privilege user can read packet and event index metadata without ObjectPrivilegeType.ReadPacket, alter COP-1 link state without SystemPrivilege.ControlLinks, and manipulate simulation time. These operations can disclose telemetry metadata, disrupt telecommand handling, and affect system integrity and availability. This issue is fixed in versions 5.12.8 and 5.13.2.

> AFFECTED_PRODUCTS

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

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EXPLOITABILITY
2.8
IMPACT
5.9

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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
Low (L)
Authentifié avec compte utilisateur basique
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-862

> CWE DETAILED DESCRIPTIONS

CWE-862: Missing Authorization - The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

> GITHUB SECURITY ADVISORY

GHSA-962x-ccwf-8x6p HIGH

Yamcs Core API has Multiple Missing Function Level Access Control vulnerabilities

AFFECTED PACKAGES:
MAVEN / org.yamcs:yamcs-core
<= 5.12.7
Fixed in: 5.12.8
MAVEN / org.yamcs:yamcs-core
>= 5.13.0, <= 5.13.1
Fixed in: 5.13.2

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Yamcs : Multiple Missing Function Level Access Control vulnerabilities in Yamcs Core API

AFFECTED PACKAGES:
Unknown / Unknown
152 versions affected
ALIASES:
GHSA-962x-ccwf-8x6p

> HISTORIQUE DES MODIFICATIONS

Première apparition
28/08/2026 20:18
Source: NVD
📊 ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-862: Missing Authorization - The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Total des modifications: 1 Dernière mise à jour: 1 month ago

> REFERENCES

https://github.com/yamcs/yamcs/commit/405139afa6094dfaf63ac17f32df1f808846c950
https://github.com/yamcs/yamcs/commit/493563679f838b86f3cdc5da9451d4a050ff6bd9
https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8
https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2
https://github.com/yamcs/yamcs/security/advisories/GHSA-962x-ccwf-8x6p
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