Vulnerability-Lookup

CVE-2026-106493 (GCVE-0-2026-106493)

Vulnerability from cvelistv5 – Published: 2026-10-06 20:52 – Updated: 2026-10-07 18:14

Title

Backstage: Cloud storage catalog locations may cross configured storage boundaries

Summary

Backstage is an open framework for building developer portals. Prior to 1.54.6, cloud storage catalog providers did not sufficiently validate object paths. A principal able to create or rename objects in a configured Azure Blob Storage or AWS S3 catalog source could cause catalog descriptors to be read from outside the intended storage boundary, limited to locations reachable with the backend's configured credentials. This issue is fixed in 1.54.6.

Severity

3 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-07 18:14 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7632 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/backstage/backstage/security/a…	x_refsource_CONFIRM
https://github.com/backstage/backstage/commit/47d…	x_refsource_MISC
https://github.com/backstage/backstage/releases/t…	x_refsource_MISC

Impacted products

4 products

Vendor	Product	Version	CPE status
backstage	backstage	Affected: < 1.54.6	guessed
@backstage	plugin-catalog-backend-module-azure	Affected: < 0.17.8	guessed
@backstage	plugin-catalog-backend-module-aws	Affected: < 0.4.27	guessed
@backstage	plugin-catalog-backend-module-azure	Affected: < 0.3.21	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-106493

Vulnerability from fkie_nvd - Published: 2026-10-06 21:17 - Updated: 2026-10-07 19:17

Severity

3.0 (Low) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/backstage/backstage/commit/47ddbd8b4a3efd812309f759c38f4877fbd9e5ff
	security-advisories@github.com	https://github.com/backstage/backstage/releases/tag/v1.54.6
	security-advisories@github.com	https://github.com/backstage/backstage/security/advisories/GHSA-xvh9-35w9-42m4

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "backstage",
          "vendor": "backstage",
          "versions": [
            {
              "status": "affected",
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        {
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}

GHSA-XVH9-35W9-42M4

Vulnerability from github – Published: 2026-10-07 17:59 – Updated: 2026-10-07 17:59

Summary

Backstage: Cloud storage catalog locations may cross configured storage boundaries

Details

Impact

Catalog entity providers for Azure Blob Storage and AWS S3 did not sufficiently validate storage object paths, which could allow catalog descriptors to be read from outside the intended storage boundary. Access is limited to locations reachable by the backend's configured credentials.

Patches

@backstage/plugin-catalog-backend-module-azure version 0.3.21
@backstage/plugin-catalog-backend-module-aws version 0.4.27
@backstage/backend-defaults version 0.7.18

Workarounds

Restrict blob and object creation or renaming in configured catalog storage sources to trusted principals.
Scope Backstage's Azure and AWS reader credentials and network access to the intended storage boundaries.
Disable an affected catalog provider if those restrictions cannot be enforced.

Severity

3.0 (Low)


                  
                    CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N

Show details on source website

JSON

To clipboard

{
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        "ecosystem": "npm",
        "name": "@backstage/plugin-catalog-backend-module-azure"
      },
      "ranges": [
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        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-106493"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-07T17:59:55Z",
    "nvd_published_at": "2026-10-06T21:17:18Z",
    "severity": "LOW"
  },
  "details": "### Impact\n\nCatalog entity providers for Azure Blob Storage and AWS S3 did not sufficiently validate storage object paths, which could allow catalog descriptors to be read from outside the intended storage boundary. Access is limited to locations reachable by the backend\u0027s configured credentials.\n\n### Patches\n\n- `@backstage/plugin-catalog-backend-module-azure` version `0.3.21`\n- `@backstage/plugin-catalog-backend-module-aws` version `0.4.27`\n- `@backstage/backend-defaults` version `0.7.18`\n\n### Workarounds\n\n- Restrict blob and object creation or renaming in configured catalog storage sources to trusted principals.\n- Scope Backstage\u0027s Azure and AWS reader credentials and network access to the intended storage boundaries.\n- Disable an affected catalog provider if those restrictions cannot be enforced.",
  "id": "GHSA-xvh9-35w9-42m4",
  "modified": "2026-10-07T17:59:55Z",
  "published": "2026-10-07T17:59:55Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/backstage/backstage/security/advisories/GHSA-xvh9-35w9-42m4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-106493"
    },
    {
      "type": "WEB",
      "url": "https://github.com/backstage/backstage/commit/47ddbd8b4a3efd812309f759c38f4877fbd9e5ff"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/backstage/backstage"
    },
    {
      "type": "WEB",
      "url": "https://github.com/backstage/backstage/releases/tag/v1.54.6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Backstage: Cloud storage catalog locations may cross configured storage boundaries"
}

Sightings

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CVE-2026-106493 (GCVE-0-2026-106493)

FKIE_CVE-2026-106493

GHSA-XVH9-35W9-42M4

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