CVE-2026-106498
Description
A flaw was found in @backstage/plugin-catalog-backend. An authenticated remote user can craft a catalog entity containing placeholder directives that reference resources outside the entity's source repository due to improper URL validation. Under certain configurations, this can lead to information disclosure by allowing access to unauthorized data.
Déclaration
This vulnerability is rated as Moderate because exploitation requires valid authenticated user access and the impact is confined to unauthorized information disclosure without enabling arbitrary command execution or system-level compromise. In products such as Red Hat Developer Hub and Red Hat Ansible Automation Platform, the catalog backend processes entity definitions within user-managed workflows, limiting unauthorized exposure to data accessible by the backend service integrations. Deployments that limit who can register or ingest new catalog entities further restrict the blast radius of this flaw.
Détails du score du système commun d'évaluation des vulnérabilités (CVSS)
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
Les mesures et les scores CVSS suivants sont préliminaires et sujets à révision.
Répartition des scores CVSS v3
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Score de base | 4.3 | N/A | 7.7 |
| Vecteur d'attaque | Network | N/A | Network |
| Complexité de l'attaque | Low | N/A | Low |
| Privilèges requis | Low | N/A | Low |
| Interaction avec l'utilisateur | None | N/A | None |
| Champ d'application | Unchanged | N/A | Changed |
| Confidentialité | Low | N/A | High |
| Impact sur l'intégrité | None | N/A | None |
| Impact sur la disponibilité | None | N/A | None |
Vecteur
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Comprendre la Défaillance (CWE)
Confidentiality
Technical Impact: Read Application Data
Integrity
Technical Impact: Execute Unauthorized Code or Commands
Access Control
Technical Impact: Bypass Protection Mechanism
By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
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