CVE-2026-53536 (GCVE-0-2026-53536)
Vulnerability from cvelistv5 – Published: 2026-07-16 18:48 – Updated: 2026-07-18 03:06
VLAI
EPSS
VEX
Title
Activepieces: Cross-tenant file download via missing JWT audience check on step-files signed URL
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-18 03:06 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/activepieces/activepieces/secu… | x_refsource_CONFIRM |
| https://github.com/activepieces/activepieces/comm… | x_refsource_MISC |
| https://github.com/activepieces/activepieces/comm… | x_refsource_MISC |
| https://github.com/activepieces/activepieces/rele… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| activepieces | activepieces |
Affected:
< 0.83.0
|
guessed |
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