Vulnerability Description
Activepieces is an open source AI workflow automation platform. Prior to 0.83.0, the /v1/step-files/signed download endpoint verified the supplied JWT against the shared signing secret but did not check the token's audience, and combined with a missing null-check on the decoded fileId, this allowed any caller holding any valid Activepieces JWT (including a freshly created user's own access token) to receive a step-file belonging to another tenant. The file returned was whatever PostgreSQL happened to scan first for type = FLOW_STEP_FILE, varying over time as the database changed, so an authenticated user could obtain step-file attachments belonging to other tenants on the same instance; the attacker could not target a specific victim or file, and the access was read-only with no integrity or availability impact. This issue is fixed in version 0.83.0.
Related Weaknesses (CWE)
References
- https://github.com/activepieces/activepieces/commit/2cb6148010a6c2a22900f4c8b08d
- https://github.com/activepieces/activepieces/commit/afe852f60e39fcc6273d41e11f07
- https://github.com/activepieces/activepieces/releases/tag/0.83.0
- https://github.com/activepieces/activepieces/security/advisories/GHSA-9723-fmff-
FAQ
What is CVE-2026-53536?
CVE-2026-53536 is a documented vulnerability. Activepieces is an open source AI workflow automation platform. Prior to 0.83.0, the /v1/step-files/signed download endpoint verified the supplied JWT against the shared signing secret but did not che...
How severe is CVE-2026-53536?
CVSS scoring is not yet available for CVE-2026-53536. Check NVD for updates.
Is there a patch for CVE-2026-53536?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.