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CVE-2026-106556

Status: AnalyzedHigh (7.7)—

Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by configuration bypass in techdocs mkdocs.yml sanitization. Insufficient validation of MkDocs configuration during TechDocs generation could allow an authenticated user who can register or modify documentation sources to execute arbitrary commands in the build environment. Impact is limited to resources accessible to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

AV:N/PR:L requiere acceso autenticado remoto (T1210). La bypasss de sanitización en mkdocs.yml permite ejecución arbitraria de comandos en el entorno de construcción (T1059). Con contexto de contenedor podría escalar privilegios (T1068).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Threat Intelligence ProgramPrivileged Account ManagementExecution PreventionDisable or Remove Feature or ProgramApplication Isolation and SandboxingExploit Protection

Affected technologies (2)

Linuxfoundation — BackstageLinuxfoundation — Backstage Plugin-techdocs-node

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-106556",
  "cveTags": [],
  "metrics": {
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          "options": [
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              "automatable": "no"
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          "version": "2.0.3",
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          "userInteraction": "NONE",
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          "value": "CWE-78"
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    }
  ],
  "lastModified": "2026-10-13T14:25:23.130",
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