Backstage: Cloud storage catalog locations may cross configured storage boundaries

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-106493
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 21:17:18 UTC
Updated2026-10-22 13:13:46 UTC
DescriptionBackstage 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.

Risk And Classification

Primary CVSS: v3.1 4.1 MEDIUM from [email protected]

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

EPSS: 0.002590000 probability, percentile 0.160840000 (date 2026-10-07)

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

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary4.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
3.1[email protected]Secondary3LOWCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N
3.1CNADECLARED3LOWCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Linuxfoundation Backstage All All All All
Application Linuxfoundation Backstage/backend-defaults All All All All
Application Linuxfoundation Backstage/plugin-catalog-backend-module-aws All All All All
Application Linuxfoundation Backstage/plugin-catalog-backend-module-azure All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Backstage Backstage affected < 1.54.6 Not specified
CNA @backstage Plugin-catalog-backend-module-azure affected < 0.17.8 Not specified
CNA @backstage Plugin-catalog-backend-module-aws affected < 0.4.27 Not specified
CNA @backstage Plugin-catalog-backend-module-azure affected < 0.3.21 Not specified

References

ReferenceSourceLinkTags
github.com/backstage/backstage/commit/47ddbd8b4a3efd812309f759c38f4877fb... [email protected] github.com Patch
github.com/backstage/backstage/security/advisories/GHSA-xvh9-35w9-42m4 [email protected] github.com Mitigation, Vendor Advisory
github.com/backstage/backstage/releases/tag/v1.54.6 [email protected] github.com Patch, Release Notes
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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