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/plugin-auth-backend (>=0.0.0-nightly-20240122021809, <=0.22.11), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20240126021148, <=0.4.14-next.1) +11 more potentially affected by CVE-2026-32235 via @backstage/plugin-auth-backend (>=0.0.0-nightly-20240929023448, <=0.27.1-next.2)

@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,...

@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, <=0.4.14-next.1) +11 more potentially affected by CVE-2026-32235 via @backstage/plugin-auth-backend (>=0.0.0-nightly-20240929023448, <=0.27.1-next.2)

@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-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-2026-32237: 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-2026-32236: 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-2026-32235: 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

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...

@backstage/plugin-search-backend-module-techdocs (>=0.0.0-nightly-20230323021924, <=0.4.12-next.1), @backstage/plugin-techdocs-backend (>=0.0.0-nightly-2021111822616, <=2.1.6-next.1) +2 more potentially affected by CVE-2026-29186 via @backstage/plugin-techdocs-node (>=0.0.0-nightly-20220315022536, <=1.14.3-next.1)

@backstage/plugin-techdocs-node NPM version =0.0.0-nightly-20220315022536, =0.0.0-nightly-20230323021924, =0.0.0-nightly-2021111822616, =0.0.0-nightly-20220305022735, =0.0.0-nightly-2021111822616, =1.10.6-next.1 Source cves: CVE-2026-29186 Source advisory: MEND:CVE-2026-29186...

@alithya-oss/backstage-plugin-scaffolder-backend-module-aws-apps (>=0.3.10, <=0.3.12), @alithya-oss/plugin-scaffolder-backend-module-aws-apps (>=0.3.6, <=0.3.9) +55 more potentially affected by CVE-2026-29184 via @backstage/plugin-scaffolder-backend (>=0.0.0-nightly-20220708025041, <=2.2.3)

@backstage/plugin-scaffolder-backend NPM version =0.0.0-nightly-20220708025041, =0.3.10, =0.3.6, =0.1.0, =0.4.0, =0.0.0-nightly-202110122318, =0.0.0-nightly-20230325022054, =0.0.0-nightly-2021101022158, =0.0.0-nightly-2021101022158, =0.0.0-nightly-20230112022659, =0.0.0-nightly-2021101022158,...

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...

@backstage/plugin-search-backend-module-techdocs (>=0.4.2-next.0, <=0.4.12-next.1), @backstage/plugin-techdocs-backend (>=0.0.0-nightly-2021111822616, <=2.1.6-next.1) +2 more potentially affected by CVE-2026-29186 via @backstage/plugin-techdocs-node (>=1.0.0, <=1.14.3-next.1)

@backstage/plugin-techdocs-node NPM version =1.0.0, =0.4.2-next.0, =0.0.0-nightly-2021111822616, =0.11.13, =0.0.0-nightly-2021111822616, =1.10.6-next.1 Source cves: CVE-2026-29186 Source advisory: OSV:GHSA-928R-FM4V-MVRW...

@backstage/plugin-search-backend-module-techdocs (>=0.4.2-next.0, <=0.4.11-next.1), @backstage/plugin-techdocs-backend (>=0.0.0-nightly-2021111822616, <=2.1.5-next.2) +2 more potentially affected by CVE-2026-29186 via @backstage/plugin-techdocs-node (>=1.0.0, <=1.14.2-next.1)

@backstage/plugin-techdocs-node NPM version =1.0.0, =0.4.2-next.0, =0.0.0-nightly-2021111822616, =0.11.13, =0.0.0-nightly-2021111822616, =1.10.5-next.1 Source cves: CVE-2026-29186 Source advisory: GHSA-928R-FM4V-MVRW...

@backstage/plugin-search-backend-module-techdocs (>=0.4.11-next.0, <=0.4.12-next.1), @backstage/plugin-techdocs-backend (>=0.0.0-nightly-20260123025240, <=2.1.6-next.1) +1 more potentially affected by CVE-2026-29186 via @backstage/plugin-techdocs-node (>=1.14.0, <=1.14.3-next.1)

@backstage/plugin-techdocs-node NPM version =1.14.0, =0.4.11-next.0, =0.0.0-nightly-20260123025240, =0.0.0-nightly-20260123025240, =1.10.6-next.1 Source cves: CVE-2026-29186 Source advisory: SNYK:JS-BACKSTAGEPLUGINTECHDOCSNODE-15426449...

@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,...

@backstage/plugin-search-backend-module-techdocs (>=0.4.2-next.0, <=0.4.9-next.1), @backstage/plugin-techdocs-backend (>=0.0.0-nightly-2021111822616, <=2.1.4-next.2) +2 more potentially affected by CVE-2026-25153 via @backstage/plugin-techdocs-node (>=1.0.0, <=1.13.11-next.0)

@backstage/plugin-techdocs-node NPM version =1.0.0, =0.4.2-next.0, =0.0.0-nightly-2021111822616, =0.11.13, =0.0.0-nightly-2021111822616, =1.10.4-next.2 Source cves: CVE-2026-25153 Source advisory: GHSA-6JR7-99PF-8VGF...

@backstage/plugin-search-backend-module-techdocs (0.4.11-next.0), @backstage/plugin-techdocs-backend (>=0.0.0-nightly-20260123025240, <=2.1.5-next.0) +1 more potentially affected by CVE-2026-25153 via @backstage/plugin-techdocs-node (>=1.14.0, <=1.14.1-next.0)

@backstage/plugin-techdocs-node NPM version =1.14.0, =0.0.0-nightly-20260123025240, =0.0.0-nightly-20260123025240, =1.10.5-next.0 Source cves: CVE-2026-25153 Source advisory: OSV:GHSA-6JR7-99PF-8VGF...

@backstage/plugin-search-backend-module-techdocs (>=0.4.2-next.0, <=0.4.9-next.1), @backstage/plugin-techdocs-backend (>=0.0.0-nightly-2021111822616, <=2.1.4-next.2) +2 more potentially affected by CVE-2026-25153 via @backstage/plugin-techdocs-node (>=1.0.0, <=1.13.11-next.0)

@backstage/plugin-techdocs-node NPM version =1.0.0, =0.4.2-next.0, =0.0.0-nightly-2021111822616, =0.11.13, =0.0.0-nightly-2021111822616, =1.10.4-next.2 Source cves: CVE-2026-25153 Source advisory: OSV:GHSA-6JR7-99PF-8VGF...

@backstage/plugin-search-backend-module-techdocs (0.4.11-next.0), @backstage/plugin-techdocs-backend (>=0.0.0-nightly-20260123025240, <=2.1.5-next.0) +1 more potentially affected by CVE-2026-25152 via @backstage/plugin-techdocs-node (>=1.14.0, <=1.14.1-next.0)

@backstage/plugin-techdocs-node NPM version =1.14.0, =0.0.0-nightly-20260123025240, =0.0.0-nightly-20260123025240, =1.10.5-next.0 Source cves: CVE-2026-25152 Source advisory: OSV:GHSA-W669-JJ7H-88M9...