Exploit for CVE-2026-21589

CVE-2026-21589 Atlassian DC Pre-Auth Arbitrary File Read,...

GHSA-C36C-CF6R-GHGJ Backstage: Inconsistent repository filtering in Bitbucket Server catalog event updates

Impact Deployments using event-driven updates in the Bitbucket Server catalog provider may ingest catalog locations from repositories that are excluded by the provider's configured project, repository, or archived-repository filters. An authenticated Bitbucket Server user who can push to a...

EUVD-2026-93992

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

Backstage: Inconsistent repository filtering in Bitbucket Server catalog event updates

Impact Deployments using event-driven updates in the Bitbucket Server catalog provider may ingest catalog locations from repositories that are excluded by the provider's configured project, repository, or archived-repository filters. An authenticated Bitbucket Server user who can push to a...

@backstage/plugin-scaffolder-backend (>=0.0.0-nightly-20240207020916, <=3.1.3-next.2), @backstage/plugin-scaffolder-backend-module-bitbucket (>=0.0.0-nightly-20240207020916, <=0.3.20-next.0) potentially affected by CVE-2026-106462 via @backstage/plugin-scaffolder-backend-module-bitbucket-server (>=0.0.0-nightly-20240929023448, <=0.2.19-next.0)

@backstage/plugin-scaffolder-backend-module-bitbucket-server NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240207020916, =0.0.0-nightly-20240207020916, =0.3.20-next.0 Source cves: CVE-2026-106462 Source advisory: OSV:GHSA-29GX-H2M3-XW44...

@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-2026-106462 via @backstage/plugin-scaffolder-backend-module-bitbucket-cloud (>=0.0.0-nightly-20240929023448, <=0.3.4-next.0)

@backstage/plugin-scaffolder-backend-module-bitbucket-cloud NPM version =0.0.0-nightly-20240929023448, =0.3.10, =0.3.6, =0.1.0, =0.4.0, =0.0.0-nightly-20240207020916, =0.0.0-nightly-20240207020916, =0.2.5, =0.3.5, =0.1.0, =0.2.3, =0.4.3, =0.1.10, =0.1.14 -...

@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-2026-106462 via @backstage/plugin-scaffolder-backend-module-bitbucket-cloud (>=0.0.0-nightly-20240929023448, <=0.3.4-next.0)

@backstage/plugin-scaffolder-backend-module-bitbucket-cloud NPM version =0.0.0-nightly-20240929023448, =0.3.10, =0.3.6, =0.1.0, =0.4.0, =0.0.0-nightly-20240207020916, =0.0.0-nightly-20240207020916, =0.2.5, =0.3.5, =0.1.0, =0.2.3, =0.4.3, =0.1.10, =0.1.14 -...

@backstage/plugin-scaffolder-backend (>=0.0.0-nightly-20240207020916, <=3.1.3-next.2), @backstage/plugin-scaffolder-backend-module-bitbucket (>=0.0.0-nightly-20240207020916, <=0.3.20-next.0) potentially affected by CVE-2026-106462 via @backstage/plugin-scaffolder-backend-module-bitbucket-server (>=0.0.0-nightly-20240929023448, <=0.2.19-next.0)

@backstage/plugin-scaffolder-backend-module-bitbucket-server NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240207020916, =0.0.0-nightly-20240207020916, =0.3.20-next.0 Source cves: CVE-2026-106462 Source advisory: GHSA-29GX-H2M3-XW44...

@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-2026-106486 via @backstage/plugin-scaffolder-backend-module-bitbucket-cloud (>=0.0.0-nightly-20240929023448, <=0.3.4-next.0)

@backstage/plugin-scaffolder-backend-module-bitbucket-cloud NPM version =0.0.0-nightly-20240929023448, =0.3.10, =0.3.6, =0.1.0, =0.4.0, =0.0.0-nightly-20240207020916, =0.0.0-nightly-20240207020916, =0.2.5, =0.3.5, =0.1.0, =0.2.3, =0.4.3, =0.1.10, =0.1.14 -...

@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-2026-106486 via @backstage/plugin-scaffolder-backend-module-bitbucket-cloud (>=0.0.0-nightly-20240929023448, <=0.3.4-next.0)

@backstage/plugin-scaffolder-backend-module-bitbucket-cloud NPM version =0.0.0-nightly-20240929023448, =0.3.10, =0.3.6, =0.1.0, =0.4.0, =0.0.0-nightly-20240207020916, =0.0.0-nightly-20240207020916, =0.2.5, =0.3.5, =0.1.0, =0.2.3, =0.4.3, =0.1.10, =0.1.14 -...

@backstage/plugin-scaffolder-backend (>=0.0.0-nightly-20240207020916, <=3.1.3-next.2), @backstage/plugin-scaffolder-backend-module-bitbucket (>=0.0.0-nightly-20240207020916, <=0.3.20-next.0) potentially affected by CVE-2026-106486 via @backstage/plugin-scaffolder-backend-module-bitbucket-server (>=0.0.0-nightly-20240929023448, <=0.2.19-next.0)

@backstage/plugin-scaffolder-backend-module-bitbucket-server NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240207020916, =0.0.0-nightly-20240207020916, =0.3.20-next.0 Source cves: CVE-2026-106486 Source advisory: GHSA-G8RX-F7M5-7794...

@backstage/plugin-scaffolder-backend (>=0.0.0-nightly-20240207020916, <=3.1.3-next.2), @backstage/plugin-scaffolder-backend-module-bitbucket (>=0.0.0-nightly-20240207020916, <=0.3.20-next.0) potentially affected by CVE-2026-106486 via @backstage/plugin-scaffolder-backend-module-bitbucket-server (>=0.0.0-nightly-20240929023448, <=0.2.19-next.0)

@backstage/plugin-scaffolder-backend-module-bitbucket-server NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240207020916, =0.0.0-nightly-20240207020916, =0.3.20-next.0 Source cves: CVE-2026-106486 Source advisory: OSV:GHSA-G8RX-F7M5-7794...

GHSA-G8RX-F7M5-7794 Backstage has iImproper filesystem validation in Bitbucket pull-request scaffolder actions

Impact An authenticated user who can execute an eligible template and influence an allowed Bitbucket repository could affect filesystem paths outside the expected working area. Depending on the backend deployment, this could compromise backend confidentiality, integrity, or availability. Patches ...

EUVD-2026-94003

Backstage has iImproper filesystem validation in Bitbucket pull-request scaffolder actions...

Backstage has iImproper filesystem validation in Bitbucket pull-request scaffolder actions

Impact An authenticated user who can execute an eligible template and influence an allowed Bitbucket repository could affect filesystem paths outside the expected working area. Depending on the backend deployment, this could compromise backend confidentiality, integrity, or availability. Patches ...

Symlink Attack

Overview @backstage/plugin-scaffolder-backend-module-bitbucket-server is a The Bitbucket Server module for @backstage/plugin-scaffolder-backend Affected versions of this package are vulnerable to Symlink Attack via the pull request workspace copy logic in bitbucketServerPullRequest.ts and the...

Symlink Attack

Overview @backstage/plugin-scaffolder-backend-module-bitbucket-cloud is a The Bitbucket Cloud module for @backstage/plugin-scaffolder-backend Affected versions of this package are vulnerable to Symlink Attack via the pull request workspace copy logic in bitbucketServerPullRequest.ts and the...

Exploit for CVE-2026-21589

CVE-2026-21589 - Jira/Confluence/Bitbucket Arbitrary File Read...

CVE-2026-21589: Critical unauthenticated arbitrary file access in Atlassian products

Overview On October 5, 2026, Atlassian published a security advisory for CVE-2026-21589, a critical arbitrary file access vulnerability affecting eight products: Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center, Crow...

CVE-2026-106486

A flaw was found in the Backstage Bitbucket Scaffolder backend modules. The Bitbucket pull request Scaffolder actions do not properly validate filesystem paths. An authenticated attacker who can execute an eligible template and influence an allowed repository can manipulate files outside the...