EUVD-2026-11675

@backstage/plugin-scaffolder-backend: Possible exposure of defaultEnvironment secrets using dry-run endpoint...

@backstage/plugin-scaffolder-backend: Possible exposure of defaultEnvironment secrets using dry-run endpoint

Impact Authenticated users with permission to execute scaffolder dry-runs can gain access to server-configured environment secrets through the dry-run API response. Secrets are properly redacted in log output but not in all parts of the response payload. Deployments that have configured...

GHSA-QP4C-XG64-7C6X @backstage/plugin-auth-backend: SSRF in experimental CIMD metadata fetch

Impact A Server-Side Request Forgery SSRF vulnerability exists in @backstage/plugin-auth-backend when auth.experimentalClientIdMetadataDocuments.enabled is set to true. The CIMD metadata fetch validates the initial clientid hostname against private IP ranges but does not apply the same validation...

EUVD-2026-11673

@backstage/plugin-auth-backend: SSRF in experimental CIMD metadata fetch...

Server-side Request Forgery (SSRF)

Overview @backstage/plugin-auth-backend is an A Backstage backend plugin that handles authentication Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the CIMD metadata fetch when the auth.experimentalClientIdMetadataDocuments.enabled setting is enabled. An...

@backstage/plugin-auth-backend: SSRF in experimental CIMD metadata fetch

Impact A Server-Side Request Forgery SSRF vulnerability exists in @backstage/plugin-auth-backend when auth.experimentalClientIdMetadataDocuments.enabled is set to true. The CIMD metadata fetch validates the initial clientid hostname against private IP ranges but does not apply the same validation...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20240122021809, <=0.22.11), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20240126021148, <=0.4.13-next.1) +11 more potentially affected by CVE-2026-32235 via @backstage/plugin-auth-backend (>=0.0.0-nightly-20240929023448, <=0.27.0-next.1)

@backstage/plugin-auth-backend NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240122021809, =0.0.0-nightly-20240126021148, =0.0.0-nightly-20240122021809, =0.0.0-nightly-202201422556, =0.0.0-nightly-202111222339, =0.0.0-nightly-2021102522541, =0.0.0-nightly-20220203021748, =1.0.0,...

EUVD-2026-11671

@backstage/plugin-auth-backend: OAuth redirect URI allowlist bypass...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20240122021809, <=0.22.11), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20240126021148, <=0.4.13-next.1) +11 more potentially affected by CVE-2026-32235 via @backstage/plugin-auth-backend (>=0.0.0-nightly-20240929023448, <=0.27.0-next.1)

@backstage/plugin-auth-backend NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240122021809, =0.0.0-nightly-20240126021148, =0.0.0-nightly-20240122021809, =0.0.0-nightly-202201422556, =0.0.0-nightly-202111222339, =0.0.0-nightly-2021102522541, =0.0.0-nightly-20220203021748, =1.0.0,...

GHSA-WQVH-63MV-9W92 @backstage/plugin-auth-backend: OAuth redirect URI allowlist bypass

Impact The experimental OIDC provider in @backstage/plugin-auth-backend is vulnerable to a redirect URI allowlist bypass. Instances that have enabled experimental Dynamic Client Registration or Client ID Metadata Documents and configured allowedRedirectUriPatterns are affected. A specially crafte...

@backstage-community/plugin-catalog-backend-module-keycloak (>=3.4.0, <=3.17.2), @dedel.alex/keycloak-admin-client-cjs (>=26.0.4, <=26.1.4) +7 more potentially affected by CVE-2026-2366 via @keycloak/keycloak-admin-client (>=26.0.0, <=26.5.5)

@keycloak/keycloak-admin-client NPM version =26.0.0, =3.4.0, =26.0.4, =26.0.0, =26.0.0, =26.0.0, =2.1.1, =0.0.7, =0.1.1 Source cves: CVE-2026-2366 Source advisory: OSV:GHSA-R8JR-WG88-FQ5C...

CVE-2026-32236: Server-Side Request Forgery (SSRF)

Backstage is an open framework for building developer portals. Prior to 0.27.1, a Server-Side Request Forgery SSRF vulnerability exists in @backstage/plugin-auth-backend when auth.experimentalClientIdMetadataDocuments.enabled is set to true. The CIMD metadata fetch validates the initial clientid...

CVE-2026-32237: Exposure of Sensitive Information to an Unauthorized Actor

Backstage is an open framework for building developer portals. Prior to 3.1.5, authenticated users with permission to execute scaffolder dry-runs can gain access to server-configured environment secrets through the dry-run API response. Secrets are properly redacted in log output but not in all...

CVE-2026-32235: URL Redirection to Untrusted Site

Backstage is an open framework for building developer portals. Prior to 0.27.1, the experimental OIDC provider in @backstage/plugin-auth-backend is vulnerable to a redirect URI allowlist bypass. Instances that have enabled experimental Dynamic Client Registration or Client ID Metadata Documents a...

CVE-2026-29186: Unrestricted Upload of File with Dangerous Type

Backstage is an open framework for building developer portals. Prior to version 1.14.3, this is a configuration bypass vulnerability that enables arbitrary code execution. The @backstage/plugin-techdocs-node package uses an allowlist to filter dangerous MkDocs configuration keys during the...

CVE-2026-25152

The CVE-2026-25152 entry concerns the Backstage @backstage/plugin-techdocs-node, where versions before 1.13.11 and 1.14.1 allow path traversal via the TechDocs local generator when techdocs.generator.runIn is set to local. This permits reading arbitrary host files as MkDocs follows symlinks in do...

CVE-2026-25152 @backstage/plugin-techdocs-node vulnerable to possible Path Traversal in TechDocs Local Generator

Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior to 1.13.11 and 1.14.1, a path traversal vulnerability in the TechDocs local generator allow...

@backstage/plugin-techdocs-backend (>=0.0.0-nightly-20260123025240, <=0.0.0-nightly-20260126030220), @techdocs/cli (>=0.0.0-nightly-20260123025240, <=0.0.0-nightly-20260126030220) potentially affected by CVE-2026-25153 via @backstage/plugin-techdocs-node (1.14.0)

@backstage/plugin-techdocs-node NPM version 1.14.0 is affected by a known vulnerability. The following packages have a transitive dependency on @backstage/plugin-techdocs-node and may be impacted: - @backstage/plugin-techdocs-backend =0.0.0-nightly-20260123025240, =0.0.0-nightly-20260123025240,...

CVE-2026-25152: Improper Limitation of a Pathname to a Restricted Directory

Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior to 1.13.11 and 1.14.1, a path traversal vulnerability in the TechDocs local generator allow...

CVE-2026-25153: Improper Control of Generation of Code

Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior to 1.13.11 and 1.14.1, when TechDocs is configured with runIn: local, a malicious actor who...