GHSA-W658-MH9P-WW8F Backstage catalog rules can be bypassed for URL locations using encoded path segments

Summary @backstage/plugin-catalog-backend matches URL-type locations against catalog.rules location patterns using the raw URL string submitted by the user, while URL readers resolve that same string in canonical form when fetching the location's content. A URL can therefore be crafted so that it...

Backstage catalog rules can be bypassed for URL locations using encoded path segments

Summary @backstage/plugin-catalog-backend matches URL-type locations against catalog.rules location patterns using the raw URL string submitted by the user, while URL readers resolve that same string in canonical form when fetching the location's content. A URL can therefore be crafted so that it...

CVE-2026-115923

Backstage is an open framework for building developer portals. Prior to 3.9.2 and from 4.0.0 until 4.0.2, DefaultCatalogRulesEnforcer in @backstage/plugin-catalog-backend compares the raw location.target URL against catalog.rules, while URL readers canonicalize the same URL before fetching it. An...

CVE-2026-115923

Backstage is an open framework for building developer portals. Prior to 3.9.2 and from 4.0.0 until 4.0.2, DefaultCatalogRulesEnforcer in @backstage/plugin-catalog-backend compares the raw location.target URL against catalog.rules, while URL readers canonicalize the same URL before fetching it. An...

CVE-2026-115923 Backstage catalog rules can be bypassed for URL locations using encoded path segments

Backstage is an open framework for building developer portals. Prior to 3.9.2 and from 4.0.0 until 4.0.2, DefaultCatalogRulesEnforcer in @backstage/plugin-catalog-backend compares the raw location.target URL against catalog.rules, while URL readers canonicalize the same URL before fetching it. An...

PT-2026-125033

Name of the Vulnerable Software and Affected Versions Backstage versions prior to 3.9.2 Backstage versions 4.0.0 through 4.0.1 Description In the @backstage/plugin-catalog-backend component, the DefaultCatalogRulesEnforcer compares the raw location.target URL against catalog.rules, whereas URL...

Backstage path traversal vulnerability

Versions prior to Backstage 3.9.2 and versions 4.0.0 through 4.0.2 contain a path traversal vulnerability. This vulnerability arises because DefaultCatalogRulesEnforcer compares the original location.target URL with catalog.rules within @backstage/plugin-catalog-backend; the URL reader then...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization via the getLocationEntity method and the event-driven update path in BitbucketServerEntityProvider.ts, where repository filters projectKey, repoSlug, and skipArchivedRepos configured by an administrator are appli...

EUVD-2026-93992

Backstage: Inconsistent repository filtering in Bitbucket Server catalog event updates...

Incorrect Authorization

Overview @backstage/plugin-catalog-backend-module-gitlab is an A Backstage catalog backend module that helps integrate towards GitLab Affected versions of this package are vulnerable to Incorrect Authorization via the GitlabOrgDiscoveryEntityProvider when handling usercreate webhook events, where...

@backstage/plugin-catalog-backend-module-gitlab-org (>=0.0.0-nightly-20240423021331, <=0.2.25-next.0) potentially affected by CVE-2026-106463 via @backstage/plugin-catalog-backend-module-gitlab (>=0.0.0-nightly-20241224023253, <=0.8.7-next.0)

@backstage/plugin-catalog-backend-module-gitlab NPM version =0.0.0-nightly-20241224023253, =0.0.0-nightly-20240423021331, =0.2.25-next.0 Source cves: CVE-2026-106463 Source advisory: SNYK:JS-BACKSTAGEPLUGINCATALOGBACKENDMODULEGITLAB-20826430...

@backstage/plugin-catalog-backend-module-gitlab-org (>=0.0.0-nightly-20240423021331, <=0.2.25-next.0) potentially affected by CVE-2026-106463 via @backstage/plugin-catalog-backend-module-gitlab (>=0.0.0-nightly-20241224023253, <=0.8.7-next.0)

@backstage/plugin-catalog-backend-module-gitlab NPM version =0.0.0-nightly-20241224023253, =0.0.0-nightly-20240423021331, =0.2.25-next.0 Source cves: CVE-2026-106463 Source advisory: GHSA-GP6M-X9VW-5C5X...

@backstage/plugin-catalog-backend-module-gitlab-org (>=0.0.0-nightly-20240423021331, <=0.2.25-next.0) potentially affected by CVE-2026-106463 via @backstage/plugin-catalog-backend-module-gitlab (>=0.0.0-nightly-20241224023253, <=0.8.7-next.0)

@backstage/plugin-catalog-backend-module-gitlab NPM version =0.0.0-nightly-20241224023253, =0.0.0-nightly-20240423021331, =0.2.25-next.0 Source cves: CVE-2026-106463 Source advisory: OSV:GHSA-GP6M-X9VW-5C5X...

GHSA-GP6M-X9VW-5C5X Backstage has improper authorization in GitLab organizational user ingestion

Impact Deployments that enable GitLab organization event ingestion and rely on scoped catalog users as an access boundary may admit an unintended catalog identity. Depending on sign-in and permission configuration, this may allow unauthorized access with the permissions of a standard authenticate...

EUVD-2026-94000

Backstage has improper authorization in GitLab organizational user ingestion...

Directory Traversal

Overview @backstage/plugin-catalog-backend-module-azure is an A Backstage catalog backend module that helps integrate towards Azure Affected versions of this package are vulnerable to Directory Traversal via the parseUrl functions in AwsS3UrlReader.ts and AzureBlobStorageUrlReader.ts, where URL...

Directory Traversal

Overview @backstage/plugin-catalog-backend-module-aws is an A Backstage catalog backend module that helps integrate towards AWS Affected versions of this package are vulnerable to Directory Traversal via the parseUrl functions in AwsS3UrlReader.ts and AzureBlobStorageUrlReader.ts, where URL path...

Incorrect Authorization

Overview @backstage/plugin-catalog-backend is a The Backstage backend plugin that provides the Backstage catalog Affected versions of this package are vulnerable to Incorrect Authorization in DefaultCatalogProcessingOrchestrator during catalog processing, where the type field of a registered...

GHSA-PCMQ-25R3-5W9V Backstage: Inconsistent enforcement of allowed location types during catalog processing

Impact 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. Patches Patched in @backstage/plugin-catalog-backend version 3.9.1 Workarounds No practical workarounds ar...

@backstage/backend-dynamic-feature-service (>=0.0.0-nightly-20251122024148, <=0.8.7-next.0), @backstage/plugin-catalog-backend-module-github (>=0.10.1-next.1, <=0.11.1-next.1) +4 more potentially affected by CVE-2026-106496 via @backstage/plugin-catalog-backend (>=3.0.0-next.0, <=3.9.0)

@backstage/plugin-catalog-backend NPM version =3.0.0-next.0, =0.0.0-nightly-20251122024148, =0.10.1-next.1, =0.3.12-next.1, =0.0.0-nightly-20251123025211, =0.1.12-next.1, =0.1.0-next.0, =0.1.3-next.0 Source cves: CVE-2026-106496 Source advisory: OSV:GHSA-PCMQ-25R3-5W9V...