GHSA-3XR5-8W6C-P5GW Backstage: Improper access control in backend action invocation

Impact An authenticated user could invoke actions that an operator had excluded through action configuration. Existing action permissions and downstream authorization remain enforced. Patches Patched in @backstage/backend-defaults version 0.17.8 Workarounds Limit access to action invocation...

EUVD-2026-97833

Backstage: Improper access control in backend action invocation...

CVE-2026-106495

Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper access control in backend action invocation. An authenticated user could invoke actions that an operator had excluded through action configuration...

CVE-2026-106495 Backstage: Improper access control in backend action invocation

Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper access control in backend action invocation. An authenticated user could invoke actions that an operator had excluded through action configuration...

CVE-2026-106495

The Backstage framework is affected by an improper access control vulnerability in the @backstage/backend-defaults package. Prior to version 0.17.8 , an authenticated user could successfully invoke backend actions that an operator had specifically excluded through action configuration. While exis...

CVE-2026-106495 Backstage: Improper access control in backend action invocation

Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper access control in backend action invocation. An authenticated user could invoke actions that an operator had excluded through action configuration...

CVE-2026-106495: Improper Access Control

Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper access control in backend action invocation. An authenticated user could invoke actions that an operator had excluded through action configuration...

PT-2026-110908

Name of the Vulnerable Software and Affected Versions Backstage versions prior to 0.17.8 Description The @backstage/backend-defaults package contains improper access control regarding backend action invocation. This allows an authenticated user to trigger actions that an operator specifically...

@alauda/dp-dynamic-plugin-backend-core (>=0.1.11, <=0.1.12), @alithya-oss/backstage-plugin-aws-apps-backend (>=0.4.5, <=0.4.7) +303 more potentially affected by CVE-2026-106492 via @backstage/backend-defaults (>=0.0.0-nightly-20240929023448, <=0.17.7)

@backstage/backend-defaults NPM version =0.0.0-nightly-20240929023448, =0.1.11, =0.4.5, =1.0.0, =2.0.6, =0.3.10, =3.0.5, =0.4.1, =2.0.3, =0.3.6, =2.5.0, =0.1.0, =0.0.1, =0.1.0, =0.1.0, =0.1.2, =0.2.2 and more Source cves: CVE-2026-106492 Source advisory: OSV:GHSA-CQ7V-RFGC-5C7V...

EUVD-2026-94012

Backstage: Improper preservation of access restrictions during service credential delegation...

EUVD-2026-94015

Backstage: Improper input validation in cloud storage URL readers...

Backstage: Improper input validation in cloud storage URL readers

Impact An attacker with write access to a cloud storage bucket used by Backstage could craft object names that could collide with protected files in the output directory. In certain deployment configurations, this could lead to content injection. Patches Patched in @backstage/backend-defaults...

CVE-2026-106494

A flaw was found in the @backstage/backend-defaults package of Backstage. Improper input validation in cloud storage URL readers allows an attacker with write access to an associated cloud storage bucket to create specially crafted object names. Under certain deployment configurations, these name...

CVE-2026-106492

A flaw was found in @backstage/backend-defaults. The package fails to properly preserve access restrictions during service credential delegation when requests are routed through plugin delegation paths. An authenticated service with limited privileges can exploit this issue to bypass access...

CVE-2026-106494

Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper input validation in cloud storage url readers. An attacker with write access to a cloud storage bucket used by Backstage could craft object names that...

CVE-2026-106492

Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions...

CVE-2026-106494 Backstage: Improper input validation in cloud storage URL readers

Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper input validation in cloud storage url readers. An attacker with write access to a cloud storage bucket used by Backstage could craft object names that...

CVE-2026-106494 Backstage: Improper input validation in cloud storage URL readers

Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper input validation in cloud storage url readers. An attacker with write access to a cloud storage bucket used by Backstage could craft object names that...

CVE-2026-106494

The Backstage framework, specifically the @backstage/backend-defaults package, is vulnerable to improper input validation in cloud storage URL readers prior to version 0.17.8 . An attacker with write access to a cloud storage bucket used by Backstage can craft object names that collide with prote...

CVE-2026-106492 Backstage: Improper preservation of access restrictions during service credential delegation

Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions...