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Vulnerabilities/CVE-2026-106556Public Intelligence Dossier
Source: linuxfoundation · Limited verification•Last verified: •Collection Degraded
CVE-2026-106556Unknown / EvaluatingHIGH (raw)CVSS 7.7CWE-78

Backstage is an open framework for building developer portals

Published: 07 Oct 2026•Last updated: 13 Oct 2026, 07:55 PM IST•Source identifier: security-advisories@github.com
Dossier completeness: source-provided sections 2 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
7.7HIGH (raw)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L
Metric sourcesecurity-advisories@github.com
EPSS probability
0.3%0.003
Percentile16th
Weakness type
CWE-78
CWE-184
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

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.

SOC priority

High

Actively exploited

Unknown

Publicly disclosed

Unknown

Risk basis: SOC ecosystem technology relevance; HIGH severity; No confirmed exploitation signal in current enrichment

Affected Products & Remediation

2 source-backed products
Affected products and versions (source)
  • linuxfoundation backstage · < 1.50.5; >= 1.51.1 < 1.54.6; 1.51.0; plugin-techdocs-node < 1.14.6; plugin-techdocs-node >= 1.15.0 < 1.15.4 · NVD CPE · Source
  • linuxfoundation backstage plugin-techdocs-node · < 1.14.6; >= 1.15.0 < 1.15.4 · NVD CPE · Source
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

Not provided by source

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched command-injection (CWE-78)

Exposure

  1. Identify installations of the affected product and compare versions with the advisory.Telemetry: DeviceTvmSoftwareVulnerabilities · A weakness class does not establish local exposure. · Rule command-injection

Exploitation evidence

  1. Review command interpreters spawned by the affected service or application.Telemetry: DeviceProcessEvents · Unexpected process lineage can support command-injection hunting. · Rule command-injection

Response

  1. Confirm the vendor mitigation or fixed version on affected assets.Telemetry: DeviceTvmSoftwareVulnerabilities · Inventory checks can verify remediation. · Rule command-injection

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
security-advisories@github.com
Record status · verification
UPDATED · NVD API
CPE
cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*, cpe:2.3:a:linuxfoundation:backstage:1.51.0:-:*:*:*:*:*:*, cpe:2.3:a:linuxfoundation:backstage:1.51.0:next0:*:*:*:*:*:*, cpe:2.3:a:linuxfoundation:backstage:1.51.0:next1:*:*:*:*:*:*, cpe:2.3:a:linuxfoundation:backstage:1.51.0:next2:*:*:*:*:*:*, cpe:2.3:a:linuxfoundation:backstage:1.51.0:next3:*:*:*:*:*:*, cpe:2.3:a:linuxfoundation:backstage_plugin-techdocs-node:*:*:*:*:*:*:*:*

Evidence & Provenance

3 public sources
github.comSource recordnvd.nist.govSource recordgithub.comSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2026-106556
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2026-106556
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2026-106556"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

Correlated briefings

— No published briefing references this CVE

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.