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TI-2026-69070 Aliases CVE-2026-106496GHSA-pcmq-25r3-5w9v

Backstage catalog backend processes disallowed location types

Priority LOW 28CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure, Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-22, CWE-863 and the CVSS impact.

Summary

The @backstage/plugin-catalog-backend npm package before 3.9.1 and the backstage product before 1.54.6 are affected. Inconsistent enforcement of allowed location types lets the catalog backend process location types that were not meant to be allowed (CWE-863). Under certain configurations, a remote attacker with low privileges can cause unintended file access on the backend host.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Backstage is an open framework for building developer portals. Prior to 3.9.1, the @backstage/plugin-catalog-backend package is affected by inconsistent enforcement of allowed location types during catalog processing. Under certain configurations, the catalog backend could process location types that were not intended to be allowed, potentially leading to unintended file access on the backend host. This issue is fixed in version 3.9.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00244 15th percentileScored 2026-11-07
Fix Partial backstage (backstage): 1.54.6plugin-catalog-backend (@backstage): 3.9.1+1 more productRed Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
backstagebackstagebefore 1.54.61.54.6Patch availableCNA
backstageplugin-catalog-backendbefore 3.9.13.9.1Patch availableCNA
—@backstage/plugin-catalog-backend (npm)before 3.9.13.9.1Patch availableGHSA-pcmq-25r3-5w9v
  • backstage Vendorbackstage Affected before 1.54.6 Fixed in 1.54.6 Patch available CNA
  • plugin-catalog-backend Vendorbackstage Affected before 3.9.1 Fixed in 3.9.1 Patch available CNA
  • @backstage/plugin-catalog-backend (npm) Vendor— Affected before 3.9.1 Fixed in 3.9.1 Patch available GHSA-pcmq-25r3-5w9v

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:backstage_plugin-catalog-backend:*:*:*:*:*:node.js:*:*before 3.9.1Vulnerablebackstage
cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*before 1.54.6Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:backstage_plugin-catalog-backend:*:*:*:*:*:node.js:*:* Versions before 3.9.1 Vulnerable ·backstage
  • cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:* Versions before 1.54.6 Vulnerable ·backstage

Remediation

Update @backstage/plugin-catalog-backend to version 3.9.1, the fixed version. The sources list no fixed version for backstage. Red Hat has no plan available for Red Hat Developer Hub 1 or Self-service automation portal 2.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA backstage (backstage) Fixed in 1.54.6
  • Fix · CNA plugin-catalog-backend (@backstage) Fixed in 3.9.1
  • Fix · GHSA-pcmq-25r3-5w9v @backstage/plugin-catalog-backend (npm) Fixed in 3.9.1 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Developer Hub 1AffectedNo fix yet: Fix deferred
Self-service automation portal 2AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-106496
  2. 2026-10-07 CISA SSVC decision points changed
  3. 2026-10-07 Alias added: GHSA-pcmq-25r3-5w9v
  4. 2026-10-07 Fix available: npm/@backstage/[email protected] · GHSA-pcmq-25r3-5w9v
  5. 2026-10-07 CVSS score added · GHSA-pcmq-25r3-5w9v
  6. 2026-10-07 Weakness changed · GHSA-pcmq-25r3-5w9v
  7. 2026-10-07 5 new references · GHSA-pcmq-25r3-5w9v
  8. 2026-10-08 Affected versions changed · Red Hat
  9. 2026-10-08 CVSS score added · Red Hat
  10. 2026-10-16 CVSS score added · NVD
  11. 2026-10-27 Affected versions changed · Red Hat

References

Patch 1

Advisory 2

Other 2

  • TI-2023-17988 Insecure sandbox in Backstage Scaffolder plugin CVSS 3.1CRITICAL 9.9
  • TI-2026-69075 Sensitive information exposure in Backstage Scaffolder CVSS 3.1CRITICAL 9.6
  • TI-2026-69061 Path traversal in Backstage Bitbucket pull-request scaffolder actions CVSS 3.1CRITICAL 9.9
  • TI-2026-60083 Backstage: Improper input validation in TechDocs MkDocs configuration CVSS 3.1HIGH 8.8
  • TI-2026-69165 Backstage TechDocs config flaw allows code execution CVSS 3.1HIGH 8.8
  • TI-2026-69083 Code injection via MkDocs theme configuration in Backstage TechDocs CVSS 3.1HIGH 8.8
See all 52 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences