{"id":"CVE-2026-53536","title":"Activepieces is an open source AI workflow automation platform","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…","severity":"none","cwe":["CWE-345","CWE-639"],"published":"2026-07-16","updated":"2026-07-18","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53536","references":[{"url":"https://github.com/activepieces/activepieces/commit/2cb6148010a6c2a22900f4c8b08d75cc5c921d1c","label":"security-advisories@github.com"},{"url":"https://github.com/activepieces/activepieces/commit/afe852f60e39fcc6273d41e11f0765586b5a0e49","label":"security-advisories@github.com"},{"url":"https://github.com/activepieces/activepieces/releases/tag/0.83.0","label":"security-advisories@github.com"},{"url":"https://github.com/activepieces/activepieces/security/advisories/GHSA-9723-fmff-mc24","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00236,"epssPercentile":0.14919,"ingestedAt":"2026-07-18T20:24:54.500Z","slug":"CVE-2026-53536","body":"## Overview\n\nActivepieces 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}